- Quarterly Schedule of Portfolio Holdings of Registered Management Investment Company (N-Q)

% of

Net Assets

Total Investment Portfolio (Cost $38,650,467,995) †

38,650,467,995

Other Assets and Liabilities, Net

(18,174,334)

Net Assets

38,632,293,661

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, DC 20549

FORM N-Q

QUARTERLY SCHEDULE OF PORTFOLIO HOLDINGS OF REGISTERED

MANAGEMENT INVESTMENT COMPANY

_______________________________

Investment Company Act file number 811-03495

DWS Money Market Trust

(Exact name of registrant as specified in charter)

345 Park Avenue

New York, NY 10154

(Address of principal executive offices) (Zip code)

Paul Schubert

345 Park Avenue

New York, NY 10154-0004

(Name and address of agent for service)

Registrant's telephone number, including area code: (212) 454-7190

Date of fiscal year end: 12/31

Date of reporting period: 3/31/10

ITEM 1.

SCHEDULE OF INVESTMENTS

Investment Portfolio

as of March 31, 2010 (Unaudited)

DWS Money Market Series

DWS Money Market Series (the “Fund”) is a feeder fund that invests substantially all of its assets in a “master portfolio”, the Cash Management Portfolio (the “Portfolio”) and owns a pro rata interest in the Portfolio’s net assets. At March 31, 2010, the Fund owned approximately 76% of the Portfolio’s outstanding interests. The Portfolio’s Schedule of Investments is set forth below.

		Principal Amount ($)			Value ($)
	Certificates of Deposit and Bank Notes 21.8%
ABN Amro Bank NV, 0.25%, 6/25/2010			42,000,000		42,000,000
Allied Irish Banks PLC, 0.25%, 4/7/2010			169,000,000		169,000,000
Banco Bilbao Vizcaya Argentaria SA:
	0.13%, 4/7/2010		345,000,000		345,000,000
	0.24%, 4/6/2010		216,000,000		216,000,000
Bank of Montreal, 0.16%, 4/7/2010			425,000,000		425,000,000
Bank of Nova Scotia:
	0.22%, 6/25/2010		5,200,000		5,200,000
	0.28%, 8/2/2010		50,000,000		49,998,294
Bank of Tokyo-Mitsubishi UFJ Ltd.:
	0.2%, 4/15/2010		200,000,000		200,000,000
	0.2%, 4/26/2010		100,000,000		100,000,000
	0.21%, 5/11/2010		50,000,000		50,000,000
	0.21%, 5/18/2010		50,000,000		50,000,000
BNP Paribas:
	0.2%, 4/19/2010		200,000,000		200,000,000
	0.23%, 4/9/2010		290,000,000		290,000,000
	0.23%, 4/21/2010		200,000,000		200,000,000
	0.28%, 5/19/2010		118,200,000		118,200,000
	0.28%, 6/10/2010		300,000,000		300,000,000
Credit Agricole SA:
	0.2%, 5/17/2010		150,000,000		150,000,000
	0.21%, 4/14/2010		200,000,000		200,000,000
	0.22%, 4/6/2010		290,000,000		290,000,000
	0.22%, 6/1/2010		200,000,000		200,000,000
	0.22%, 6/3/2010		200,000,000		200,000,000
	0.23%, 5/20/2010		150,000,000		150,002,041
Dexia Credit Local:
	0.48%, 4/6/2010		200,000,000		200,000,000
	0.49%, 4/5/2010		40,000,000		40,000,022
DnB NOR Bank ASA, 0.28%, 5/20/2010			120,200,000		120,200,000
Intesa Sanpaolo SpA:
	0.19%, 4/12/2010		75,000,000		75,000,000
	0.28%, 6/8/2010		200,000,000		200,000,000
KBC Bank NV:
	0.27%, 5/4/2010		200,000,000		200,000,000
	0.3%, 5/7/2010		100,000,000		100,000,000
Kreditanstalt fuer Wiederaufbau, 5.0%, 6/1/2010			54,639,000		55,027,555
Landeskreditbank Baden-Wuerttemberg Foerderbank, 4.25%, 9/15/2010			113,000,000		114,954,496
Lloyds TSB Bank PLC, 0.2%, 4/26/2010			350,000,000		350,000,000
Mizuho Corporate Bank Ltd.:
	0.2%, 4/14/2010		134,300,000		134,300,000
	0.2%, 4/26/2010		122,000,000		122,000,000
	0.21%, 5/17/2010		115,000,000		115,000,000
	0.22%, 5/21/2010		100,000,000		100,000,000
National Bank of Canada, 0.25%, 6/25/2010			300,000,000		300,000,000
Natixis, 0.2%, 4/7/2010			500,000,000		500,000,000
Nordea Bank Finland PLC, 0.75%, 9/23/2010			75,500,000		75,500,000
NRW.Bank, 5.375%, 7/19/2010			25,000,000		25,375,444
Rabobank Nederland NV, 0.2%, 5/7/2010			200,000,000		200,000,000
Skandinaviska Enskilda Banken AB, 0.3%, 5/4/2010			128,000,000		128,000,000
Societe Generale:
	0.24%, 5/4/2010		300,000,000		300,000,000
	0.25%, 4/6/2010		24,000,000		24,000,000
Sumitomo Mitsui Banking Corp.:
	0.2%, 4/15/2010		113,000,000		113,000,000
	0.2%, 4/19/2010		100,000,000		100,000,250
	0.2%, 4/27/2010		250,000,000		250,000,000
	0.22%, 5/26/2010		48,500,000		48,500,000
Svensk Exportkredit AB, 4.5%, 9/27/2010			30,000,000		30,562,271
Svenska Handelsbanken AB:
	0.2%, 4/7/2010		130,000,000		130,000,108
	0.21%, 6/10/2010		52,500,000		52,500,510
Toronto-Dominion Bank:
	0.35%, 4/23/2010		40,000,000		40,000,000
	0.65%, 4/1/2010		62,000,000		62,000,000
Wal-Mart Stores, Inc., 5.321%, 6/1/2010			148,500,000		149,649,337
Westpac Banking Corp., 0.55%, 4/23/2010			12,500,000		12,500,988

Total Certificates of Deposit and Bank Notes (Cost $8,418,471,316)				8,418,471,316
	Commercial Paper 31.7%
Issued at Discount **
Anglo Irish Bank Corp., Ltd., 144A, 0.27%, 4/9/2010			124,000,000		123,992,560
Antalis US Funding Corp.:
	144A, 0.21%, 4/13/2010		29,030,000		29,027,968
	144A, 0.22%, 4/8/2010		25,000,000		24,998,931
	144A, 0.22%, 4/12/2010		40,000,000		39,997,311
ASB Finance Ltd., 0.36%, 4/8/2010			20,000,000		19,998,600
Bank of Montreal:
	0.19%, 4/12/2010		200,000,000		199,988,389
	0.195%, 5/24/2010		100,000,000		99,971,292
BNP Paribas Finance, Inc., 0.16%, 4/5/2010			8,818,000		8,817,843
BNZ International Funding Ltd.:
	144A, 0.34%, 4/6/2010		150,000,000		149,992,917
	144A, 0.35%, 4/6/2010		30,000,000		29,998,542
BPCE SA:
	0.24%, 5/10/2010		15,000,000		14,996,100
	0.25%, 4/27/2010		21,000,000		20,996,208
CAFCO LLC:
	144A, 0.2%, 4/19/2010		36,350,000		36,346,365
	144A, 0.2%, 4/22/2010		100,000,000		99,988,333
Caisse D'Amortissement de la Dette Sociale, 0.48%, 4/19/2010			63,000,000		62,984,880
Cancara Asset Securitisation LLC:
	144A, 0.23%, 4/19/2010		30,000,000		29,996,550
	144A, 0.23%, 4/20/2010		34,000,000		33,995,873
Charta Corp., 144A, 0.2%, 5/7/2010			150,000,000		149,970,000
Danske Corp.:
	144A, 0.18%, 4/12/2010		26,250,000		26,248,556
	144A, 0.2%, 4/12/2010		24,000,000		23,998,533
DnB NOR Bank ASA, 0.29%, 6/4/2010			500,000,000		499,742,222
Eksportfinans AS, 0.16%, 4/8/2010			20,000,000		19,999,378
Fairway Finance LLC, 144A, 0.18%, 4/7/2010			27,016,000		27,015,190
General Electric Capital Corp.:
	0.18%, 4/21/2010		75,000,000		74,992,500
	0.22%, 4/23/2010		155,000,000		154,979,161
	0.24%, 4/14/2010		130,000,000		129,988,733
	0.28%, 5/18/2010		100,000,000		99,963,444
General Electric Capital Services, Inc., 0.2%, 5/20/2010			150,000,000		149,959,167
Grampian Funding LLC:
	144A, 0.26%, 5/17/2010		78,000,000		77,974,087
	144A, 0.26%, 5/18/2010		20,000,000		19,993,211
	144A, 0.26%, 6/2/2010		40,000,000		39,982,089
	144A, 0.27%, 4/22/2010		54,000,000		53,991,495
	144A, 0.28%, 4/12/2010		69,300,000		69,294,071
	144A, 0.31%, 4/6/2010		28,000,000		27,998,794
Hannover Funding Co., LLC:
	0.5%, 4/27/2010		19,000,000		18,993,139
	0.55%, 4/5/2010		40,000,000		39,997,556
ING (US) Funding LLC:
	0.18%, 4/12/2010		21,100,000		21,098,840
	0.18%, 5/3/2010		100,000,000		99,984,000
	0.19%, 5/19/2010		250,000,000		249,935,333
Irish Life & Permanent Group Holdings PLC, 144A, 0.4%, 4/13/2010			100,000,000		99,986,667
Johnson & Johnson:
	144A, 0.18%, 4/29/2010		200,000,000		199,972,000
	144A, 0.19%, 4/26/2010		79,800,000		79,789,471
	144A, 0.2%, 5/14/2010		45,300,000		45,289,178
	144A, 0.2%, 6/3/2010		100,000,000		99,965,000
	144A, 0.22%, 7/1/2010		100,000,000		99,944,389
	144A, 0.22%, 8/2/2010		100,000,000		99,924,833
	144A, 0.29%, 8/9/2010		50,000,000		49,947,639
JPMorgan Chase & Co., 0.25%, 7/26/2010			182,750,000		182,602,785
Kreditanstalt fuer Wiederaufbau, 0.18%, 5/21/2010			130,000,000		129,967,500
LMA Americas LLC, 144A, 0.2%, 4/12/2010			36,000,000		35,997,800
Microsoft Corp.:
	0.1%, 4/8/2010		25,000,000		24,999,514
	0.1%, 5/26/2010		50,000,000		49,992,361
	0.15%, 4/14/2010		25,000,000		24,998,646
	0.19%, 5/10/2010		100,000,000		99,979,417
	0.19%, 7/21/2010		72,000,000		71,957,820
Natexis Banques Populaires US Finance Co., LLC:
	0.26%, 4/21/2010		144,700,000		144,679,099
	0.27%, 5/11/2010		100,000,000		99,970,000
Natixis Commercial Paper Corp.:
	0.25%, 5/18/2010		40,000,000		39,986,944
	0.25%, 5/3/2010		31,000,000		30,993,111
	0.27%, 5/11/2010		90,000,000		89,973,000
Nestle Capital Corp., 0.15%, 6/1/2010			200,000,000		199,949,167
Nestle Finance International Ltd.:
	0.27%, 8/24/2010		100,000,000		99,891,250
	0.27%, 8/25/2010		98,650,000		98,541,978
New York Life Capital Corp.:
	144A, 0.17%, 5/3/2010		15,000,000		14,997,733
	144A, 0.18%, 5/10/2010		20,000,000		19,996,100
	144A, 0.2%, 5/21/2010		24,024,000		24,017,327
Nieuw Amsterdam Receivables Corp.:
	144A, 0.1%, 4/1/2010		9,357,000		9,357,000
	144A, 0.2%, 4/6/2010		50,000,000		49,998,611
	144A, 0.2%, 4/12/2010		63,800,000		63,796,101
	144A, 0.21%, 4/9/2010		163,460,000		163,452,372
	144A, 0.21%, 4/16/2010		49,300,000		49,295,686
	144A, 0.22%, 4/6/2010		25,000,000		24,999,236
	144A, 0.22%, 4/9/2010		80,000,000		79,996,089
NRW.Bank:
	0.21%, 4/12/2010		265,800,000		265,782,882
	0.21%, 4/13/2010		169,000,000		168,988,170
	0.22%, 5/17/2010		86,150,000		86,125,782
	0.22%, 5/18/2010		128,700,000		128,663,035
	0.22%, 5/25/2010		124,000,000		123,959,080
	0.25%, 7/6/2010		21,000,000		20,986,000
	0.445%, 4/23/2010		75,000,000		74,979,604
	0.45%, 7/8/2010		188,500,000		188,269,088
	0.461%, 6/28/2010		94,265,000		94,159,004
	0.49%, 5/24/2010		125,000,000		124,909,826
Old Line Funding LLC, 144A, 0.17%, 4/14/2010			62,026,000		62,022,192
PepsiCo, Inc., 0.15%, 4/14/2010			125,000,000		124,993,229
Procter & Gamble International Funding SCA, 144A, 0.13%, 4/12/2010			33,000,000		32,998,689
Rabobank USA Financial Corp., 0.185%, 4/14/2010			150,000,000		149,989,979
Romulus Funding Corp.:
	144A, 0.27%, 4/8/2010		10,000,000		9,999,475
	144A, 0.29%, 4/9/2010		35,000,000		34,997,745
	144A, 0.29%, 5/7/2010		124,500,000		124,463,895
Salisbury Receivables Co., LLC, 144A, 0.2%, 5/5/2010			83,500,000		83,484,228
Scaldis Capital LLC:
	0.2%, 4/12/2010		200,000,000		199,987,778
	0.2%, 4/19/2010		125,000,000		124,987,500
	0.2%, 4/20/2010		60,000,000		59,993,667
	0.21%, 4/23/2010		58,000,000		57,992,557
	0.23%, 5/7/2010		100,000,000		99,977,000
Sheffield Receivables Corp.:
	144A, 0.21%, 5/10/2010		100,000,000		99,977,250
	144A, 0.22%, 6/2/2010		100,000,000		99,962,111
Societe de Prise de Participation de l'Etat:
	144A, 0.21%, 5/20/2010		31,500,000		31,490,996
	144A, 0.21%, 5/25/2010		84,000,000		83,973,540
	144A, 0.25%, 5/26/2010		155,000,000		154,940,799
Societe Generale North America, Inc.:
	0.23%, 4/15/2010		100,000,000		99,991,056
	0.23%, 5/25/2010		65,000,000		64,977,575
	0.24%, 4/16/2010		104,475,000		104,464,553
	0.24%, 5/14/2010		133,000,000		132,961,873
Standard Chartered Bank, 0.25%, 4/1/2010			93,500,000		93,500,000
Starbird Funding Corp.:
	144A, 0.19%, 5/26/2010		50,000,000		49,985,486
	144A, 0.2%, 6/8/2010		50,000,000		49,981,111
Straight-A Funding LLC:
	144A, 0.14%, 4/5/2010		52,520,000		52,519,183
	144A, 0.17%, 4/5/2010		160,290,000		160,286,973
	144A, 0.17%, 4/6/2010		50,000,000		49,998,819
	144A, 0.17%, 4/8/2010		100,122,000		100,118,690
	144A, 0.17%, 4/19/2010		62,690,000		62,684,671
	144A, 0.17%, 4/21/2010		50,000,000		49,995,278
	144A, 0.17%, 4/27/2010		130,000,000		129,984,039
	144A, 0.17%, 5/4/2010		100,000,000		99,984,416
	144A, 0.18%, 5/3/2010		83,266,000		83,252,677
	144A, 0.18%, 5/5/2010		135,500,000		135,476,965
	144A, 0.19%, 5/12/2010		60,000,000		59,987,017
	144A, 0.19%, 5/14/2010		25,160,000		25,154,290
	144A, 0.19%, 5/17/2010		78,000,000		77,981,063
	144A, 0.19%, 5/19/2010		108,000,000		107,972,640
	144A, 0.19%, 5/20/2010		77,000,000		76,980,087
	144A, 0.2%, 6/1/2010		124,087,000		124,044,948
	144A, 0.2%, 6/2/2010		50,000,000		49,982,778
	144A, 0.2%, 6/4/2010		50,000,000		49,982,222
Sumitomo Mitsui Banking Corp., 0.2%, 4/20/2010			75,000,000		74,992,083
Swedbank AB:
	144A, 0.86%, 6/3/2010		120,000,000		119,819,400
	144A, 0.89%, 5/28/2010		117,700,000		117,534,141
	144A, 0.99%, 5/11/2010		100,000,000		99,890,000
	144A, 1.02%, 6/24/2010		22,000,000		21,947,640
	144A, 1.07%, 6/10/2010		25,000,000		24,947,986
	144A, 1.09%, 6/14/2010		104,000,000		103,766,982
Tasman Funding, Inc.:
	144A, 0.24%, 4/12/2010		100,000,000		99,992,667
	144A, 0.24%, 4/14/2010		48,000,000		47,995,840
Tempo Finance Corp., 144A, 0.21%, 4/6/2010			50,000,000		49,998,542
Toyota Credit Canada, Inc.:
	0.23%, 5/12/2010		50,000,000		49,986,903
	0.3%, 4/8/2010		50,000,000		49,997,083
	0.3%, 4/22/2010		50,000,000		49,991,250
Toyota Credit de Puerto Rico, 0.3%, 4/8/2010			50,000,000		49,997,083
Toyota Motor Credit Corp.:
	0.2%, 4/23/2010		50,000,000		49,993,889
	0.25%, 4/8/2010		71,000,000		70,996,549
	0.25%, 4/9/2010		150,000,000		149,991,667
	0.3%, 4/14/2010		138,600,000		138,584,985
Yorktown Capital LLC, 144A, 0.24%, 6/25/2010			82,108,000		82,061,472

Total Commercial Paper (Cost $12,259,183,658)				12,259,183,658
	Government & Agency Obligations 8.9%
Foreign Government Obligations 0.4%
Kingdom of Sweden, 1.0%, 4/26/2010			162,000,000		162,052,722
Other Government Related (a) 1.5%
Bank of America NA, FDIC Guaranteed, 1.7%, 12/23/2010			50,000,000		50,478,328
Dexia Credit Local, 0.701% *, 4/18/2011			115,000,000		115,012,752
JPMorgan Chase & Co., FDIC Guaranteed, 2.625%, 12/1/2010			40,000,000		40,602,916
Kreditanstalt fuer Wiederaufbau, 0.526% *, 3/2/2011			7,860,000		7,884,626
Queensland Treasury Corp., 0.271% *, 6/18/2010			180,000,000		180,000,000
Royal Bank of Scotland PLC, 0.3% *, 5/21/2010			180,000,000		180,000,000

					573,978,622
US Government Sponsored Agencies 6.9%
Federal Home Loan Bank:
	Step-up Coupon, 0.2% to 4/26/2010, 0.4% to 7/26/2010, 0.6% to 10/26/2010, 0.8% to 1/26/2011		100,000,000		100,000,000
	0.25%, 12/21/2010		12,000,000		11,991,623
	Step-up Coupon, 0.25% to 8/10/2010, 0.55% to 2/10/2011		62,595,000		62,589,149
	0.26% *, 7/13/2010		500,000,000		500,007,213
	0.3% *, 5/28/2010		150,000,000		150,000,000
	0.32% *, 5/21/2010		300,000,000		300,000,000
	0.375%, 10/26/2010		17,600,000		17,609,152
	0.48%, 10/25/2010		22,500,000		22,525,016
	0.5%, 7/13/2010		60,750,000		60,733,372
	0.5%, 11/23/2010		20,000,000		20,018,730
	0.55%, 7/29/2010		98,450,000		98,441,334
Federal Home Loan Mortgage Corp.:
	0.158% **, 6/14/2010		83,196,000		83,168,638
	0.188% **, 7/13/2010		50,000,000		49,972,819
	0.209% **, 8/24/2010		47,500,000		47,459,823
	0.229% **, 9/1/2010		34,518,000		34,484,259
	0.238% **, 7/12/2010		56,020,000		55,981,906
	0.279% **, 10/26/2010		72,700,000		72,582,387
	0.421% **, 5/17/2010		19,050,000		19,039,533
	1.43%, 9/3/2010		97,500,000		97,829,585
Federal National Mortgage Association:
	0.093% **, 5/4/2010		33,920,000		33,917,046
	0.109% **, 6/1/2010		90,000,000		89,983,225
	0.208% **, 7/1/2010		55,000,000		54,970,804
	0.208% **, 8/2/2010		240,000,000		239,827,800
	0.219% **, 8/25/2010		200,000,000		199,821,556
	0.269% **, 10/25/2010		100,000,000		99,844,750
	0.279% **, 11/1/2010		47,350,000		47,271,189
	0.443% **, 6/1/2010		20,000,000		19,984,750
	0.546% **, 8/5/2010		18,400,000		18,364,580
	7.125%, 6/15/2010		50,000,000		50,675,000

					2,659,095,239
US Treasury Obligations 0.1%
US Treasury Bills:
	0.035% **, 4/1/2010		11,022,000		11,022,000
	0.05% **, 4/8/2010		907,000		906,991
	0.1% **, 4/22/2010		2,991,000		2,990,826
	0.1% **, 5/6/2010		4,000,000		3,999,611
	0.11% **, 4/22/2010		200,000		199,987
	0.125% **, 4/29/2010		14,500,000		14,498,590
	0.145% **, 5/20/2010		2,966,000		2,965,415
	0.205% **, 6/10/2010		2,534,000		2,532,990
	0.43% **, 7/29/2010		10,000,000		9,985,786
	0.49% **, 7/29/2010		1,100,000		1,098,218

					50,200,414

Total Government & Agency Obligations (Cost $3,445,326,997)				3,445,326,997
	Short Term Notes * 11.4%
ASB Finance Ltd., 144A, 0.358%, 12/3/2010			100,000,000		100,005,513
Bank of America Corp., 0.42%, 8/13/2010			240,000,000		240,113,708
Bank of America NA:
	0.827%, 6/23/2010		10,200,000		10,212,735
	0.85%, 5/12/2010		42,128,000		42,155,706
Bank of Nova Scotia, 0.255%, 11/23/2010			35,700,000		35,700,000
Barclays Bank PLC, 0.447%, 4/21/2010			343,000,000		343,000,000
Bayerische Landesbank, 0.307%, 4/22/2011			40,000,000		39,976,675
Canadian Imperial Bank of Commerce:
	0.2%, 8/25/2010		190,500,000		190,500,000
	0.23%, 10/15/2010		50,000,000		50,000,000
	0.23%, 12/13/2010		100,000,000		100,000,000
	0.25%, 7/26/2010		35,000,000		35,000,000
Commonwealth Bank of Australia, 144A, 0.381%, 6/24/2010			122,500,000		122,500,000
Credit Agricole SA, 144A, 0.301%, 5/28/2010			46,367,000		46,372,286
General Electric Capital Corp., 0.31%, 4/5/2010			1,300,000		1,300,000
Governor & Co. of the Bank of Ireland:
	0.576%, 4/26/2010		130,000,000		130,000,000
	0.596%, 4/26/2010		75,000,000		75,000,000
JPMorgan Chase Bank NA, 0.247%, 4/28/2011			191,200,000		191,200,000
Merrill Lynch & Co., Inc., 2.5%, 5/12/2010			75,960,000		76,157,718
National Australia Bank Ltd.:
	144A, 0.276%, 1/27/2011		160,000,000		160,000,000
	0.351%, 7/12/2010		133,000,000		133,000,000
Natixis:
	0.28%, 6/9/2010		188,000,000		188,000,000
	0.3%, 5/5/2010		150,000,000		150,000,000
Procter & Gamble International Funding SCA, 0.258%, 5/7/2010			100,000,000		100,000,000

Rabobank Nederland NV:
	0.229%, 11/22/2010		52,500,000		52,500,000
	0.23%, 3/11/2011		50,000,000		50,000,000
	144A, 0.25%, 3/16/2011		75,000,000		75,000,000
	144A, 0.252%, 4/7/2011		278,000,000		278,000,000
	144A, 0.65%, 5/19/2010		173,894,000		174,001,814
Royal Bank of Canada:
	0.23%, 3/10/2011		100,000,000		100,000,000
	0.23%, 3/14/2011		50,000,000		50,000,000
	0.247%, 2/24/2011		50,000,000		50,000,000
Societe Generale, 0.501%, 4/19/2010			275,000,000		275,000,000
Toronto-Dominion Bank, 0.228%, 2/4/2011			208,000,000		208,000,000
Wachovia Bank NA, 0.311%, 5/25/2010			2,000,000		2,000,239
Westpac Banking Corp.:
	0.24%, 4/15/2010		125,000,000		125,000,000
	0.27%, 1/10/2011		130,000,000		130,000,000
	144A, 0.285%, 12/13/2010		100,000,000		100,000,000
	0.304%, 7/6/2010		119,350,000		119,350,000
	144A, 0.385%, 7/2/2010		50,000,000		50,000,000

Total Short Term Notes (Cost $4,399,046,394)				4,399,046,394
	Supranational 0.4%
Inter-American Development Bank, 0.34% **, 8/16/2010			148,000,000		147,808,505
International Bank for Reconstruction & Development, 0.17% **, 5/7/2010			2,321,000		2,320,605

Total Supranational (Cost $150,129,110)				150,129,110
	Time Deposits 17.2%
Bank of Nova Scotia, 0.16%, 4/7/2010			640,000,000		640,000,000
Bank of Tokyo-Mitsubishi UFJ Ltd., 0.06%, 4/1/2010			355,047,281		355,047,281
BNP Paribas, 0.05%, 4/1/2010			500,000,000		500,000,000
Caixa Geral de Depositos SA, 0.14%, 4/7/2010			250,000,000		250,000,000
Calyon, 0.09%, 4/1/2010			134,857,873		134,857,873
Canadian Imperial Bank of Commerce, 0.12%, 4/6/2010			400,000,000		400,000,000
Citibank NA:
	0.08%, 4/1/2010		4,308,411		4,308,411
	0.18%, 4/7/2010		500,000,000		500,000,000
Governor & Co. of the Bank of Ireland, 0.25%, 4/7/2010			325,000,000		325,000,000
JPMorgan Chase Bank NA:
	0.01%, 4/1/2010		548,000,000		548,000,000
	0.062%, 4/1/2010		800,000,000		800,000,000
KBC Bank NV:
	0.04%, 4/1/2010		432,000,000		432,000,000
	0.14%, 4/5/2010		600,000,000		600,000,000
Lloyds TSB Bank PLC, 0.12%, 4/7/2010			400,000,000		400,000,000
National Bank of Canada, 0.062%, 4/1/2010			400,000,000		400,000,000
Nordea Bank Finland PLC, 0.16%, 4/6/2010			355,000,000		355,000,000

Total Time Deposits (Cost $6,644,213,565)				6,644,213,565
	Municipal Bonds and Notes 6.6%
Alaska, State Housing Finance Corp., Capital Project, Series C, 0.3% ***, 7/1/2022			24,295,000		24,295,000
Blount County, TN, Public Building Authority, Local Government Public Improvement:
	Series C-3-A, 0.28% ***, 6/1/2029		10,000,000		10,000,000
	Series E-5-A, 0.32% ***, 6/1/2030, Branch Banking & Trust (b)		40,000,000		40,000,000
Burke County, GA, Development Authority, Pollution Control Revenue, Georgia Power Co. Vogtle Project, Series 1, 0.28% ***, 7/1/2049			37,335,000		37,335,000
California, Housing Finance Agency Revenue, Home Mortgage:
	Series K, AMT, 0.3% ***, 8/1/2037		25,000,000		25,000,000
	Series D, AMT, 0.3% ***, 2/1/2043		15,685,000		15,685,000
California, Infrastructure & Economic Development Bank Revenue, Jewish Community Center, Series A, 0.28% ***, 12/1/2031, Bank of America NA (b)			12,300,000		12,300,000
California, State Department of Water Resources, Power Supply Revenue, Series I-2, 0.27% ***, 5/1/2022, Landesbank Hessen-Thuringen (b)			5,200,000		5,200,000
California, Regents of the University of California, 0.22%, 4/13/2010			39,737,000		39,734,086
Clark County, NV, Industrial Development Revenue, Southwest Gas Corp., Series A, 0.27% ***, 12/1/2039, JPMorgan Chase Bank (b)			12,000,000		12,000,000
Colorado, Educational & Cultural Facilities Authority Revenue, Linfield Christian School Project, 0.27% ***, 5/1/2030, Evangelical Christian Credit Union (b)			16,200,000		16,200,000
Colorado, Health Facilities Authority Revenue, Bethesda Adult Communities, Series A, 0.27% ***, 8/15/2034, LaSalle Bank NA (b)			10,000,000		10,000,000
Colorado, Health Facilities Authority Revenue, Fraiser Meadows Community Project, 0.27% ***, 6/1/2038, JPMorgan Chase Bank (b)			14,000,000		14,000,000
Colorado, Housing & Finance Authority, Series I-A1, 144A, 0.25% ***, 10/1/2036			42,505,000		42,505,000
Colorado, Housing & Finance Authority, Single Family Program, Series I-A1, 0.29% ***, 11/1/2034			16,700,000		16,700,000
Colorado, Housing Finance Authority, Single Family Mortgage Revenue:
	"I", Series B1, 0.22% ***, 5/1/2038		48,500,000		48,500,000
	"I", Series A-2, 0.25% ***, 5/1/2038		27,900,000		27,900,000
District of Columbia, Anacostia Waterfront Corp., Pilot Revenue, Series F02, 144A, 0.29% ***, 9/30/2022			99,000,000		99,000,000
Florida, Jacksonville Electric Authority, Electric Systems Revenue:
	Series 200F, 0.25%, 6/3/2010		33,200,000		33,200,000
	Series 2000B, 0.25%, 6/10/2010		43,800,000		43,800,000
	Series 3D-2-B, 0.29% ***, 10/1/2037		37,160,000		37,160,000
Florida, Sunshine State Governmental Financing Commission, 0.37%, 4/1/2010			25,000,000		25,000,000
Georgia, Private Colleges & Universities Authority Revenue, Emory University, Series C1, 0.27% ***, 9/1/2036			17,300,000		17,300,000
Glen Cove, NY, Housing Authority Revenue, Series 57G, 144A, AMT, 0.33% ***, 10/1/2026			12,850,000		12,850,000
Harris County, TX, Health Facilities Development Corp., Hospital Revenue, Baylor College of Medicine, Series B, 0.28% ***, 11/15/2047, Northern Trust Co. (b)			10,000,000		10,000,000
Hillsborough County, FL, School Board, Certificates of Participation, Master Lease Program, Series A, 0.3% ***, 7/1/2023, Wells Fargo Bank NA (b) (c)			10,000,000		10,000,000
Idaho, Health Facilities Authority Revenue, St. Luke's Health Systems Project, Series A, 0.3% ***, 11/1/2043, Wells Fargo Bank NA (b)			10,000,000		10,000,000
Illinois, Development Finance Authority Revenue, Chicago Symphony Project, 0.27% ***, 12/1/2033, Bank One NA (b)			11,000,000		11,000,000
Illinois, Finance Authority Revenue, Carle Foundation, Series D, 0.3% ***, 2/15/2033, JPMorgan Chase Bank (b)			29,375,000		29,375,000
Illinois, Finance Authority Revenue, Rehabilitation Institute of Chicago:
	Series B, 0.3% ***, 4/1/2032, JPMorgan Chase Bank (b)		17,600,000		17,600,000
	Series A, 0.3% ***, 4/1/2039, JPMorgan Chase Bank (b)		8,565,000		8,565,000
Illinois, Finance Authority, Pollution Control Revenue, Commonwealth Edison Co., Series F, 144A, 0.28% ***, 3/1/2017, JPMorgan Chase Bank (b)			10,100,000		10,100,000
Illinois, Northwestern University:
	0.21%, 6/15/2010		34,000,000		33,985,125
	0.23%, 6/3/2010		30,000,000		29,987,925
Iowa, Finance Authority, Multi-Family Revenue, Windsor on the River LLC, Series A, AMT, 0.34% ***, 5/1/2042, Wells Fargo Bank NA (b)			17,000,000		17,000,000
Kansas, State Department of Transportation Highway Revenue:
	Series A-2, 0.24% ***, 9/1/2014		19,300,000		19,300,000
	Series C-3, 0.25% ***, 9/1/2024		18,675,000		18,675,000
Maine, State Housing Authority, Mortgage Purchase Revenue, Series D, AMT, 0.34% ***, 11/15/2042			10,000,000		10,000,000
Massachusetts, Bay Transportation Authority, General Transportation Systems, 0.3% ***, 3/1/2030			15,400,000		15,400,000
Massachusetts, State Development Finance Agency Revenue, College of the Holy Cross, Series A, 0.3% ***, 9/1/2037, Bank of America NA (b)			24,000,000		24,000,000
Massachusetts, State Development Finance Agency Revenue, Wentworth Institute of Technology, 0.29% ***, 10/1/2030, RBS Citizens NA (b)			28,285,000		28,285,000
Massachusetts, State General Obligation, Series A, 0.3% ***, 9/1/2016			33,200,000		33,200,000
Massachusetts, State Health & Educational Facilities Authority Revenue, Amherst College, Series J-1, 0.28% ***, 11/1/2035			23,895,000		23,895,000
Massachusetts, State Health & Educational Facilities Authority Revenue, Boston University, Series N, 0.3% ***, 10/1/2034, Bank of America NA (b)			13,600,000		13,600,000
Michigan, State University Revenues:
	Series 2000-A, 0.25% ***, 8/15/2030		26,430,000		26,430,000
	Series A, 0.25% ***, 8/15/2030		30,420,000		30,420,000
	Series A, 0.28% ***, 4/1/2038		12,000,000		12,000,000
Minnesota, State Housing Finance Agency, Residential Housing, Series J, AMT, 0.3% ***, 7/1/2033			7,500,000		7,500,000
Mississippi, Business Finance Corp., Gulf Opportunity Zone, Chevron USA, Inc. Project:
	Series A, 0.26% ***, 12/1/2030		76,100,000		76,100,000
	Series C, 0.26% ***, 12/1/2030		28,000,000		28,000,000
Missouri, State Health & Educational Facilities Authority Revenue, Lutheran Senior Services Project, 0.27% ***, 2/1/2039, US Bank NA (b)			9,000,000		9,000,000
Montgomery County, TN, Public Building Authority, Pooled Financing Revenue, Tennessee County Loan Pool, 0.31% ***, 7/1/2038, Bank of America NA (b)			4,865,000		4,865,000
Nashville & Davidson County, TN, Metropolitan Government, Health & Educational Facilities Board Revenue, Vanderbilt University, Series A, 0.28% ***, 10/1/2030			24,850,000		24,850,000
Nassau County, NY, Industrial Development Agency Revenue, Series 75G, 144A, AMT, 0.33% ***, 12/1/2033			15,495,000		15,495,000
New Hampshire, Health & Education Facilities Authority Revenue, Phillips Exeter Academy, 0.29% ***, 9/1/2042			20,000,000		20,000,000
New Hampshire, Health & Education Facilities Authority Revenue, RiverWoods Co. at Exeter, 0.27% ***, 3/1/2038, Bank of America NA (b)			29,000,000		29,000,000
New Jersey, State Transportation Trust Fund Authority, Transportation Systems, Series D, 0.29% ***, 6/15/2032, Sumitomo Mitsui Banking (b)			23,000,000		23,000,000
New York, Metropolitan Transportation Authority Revenue, Series E-2, 0.25% ***, 11/1/2035, Fortis Bank SA (b)			14,385,000		14,385,000
New York, State Dormitory Authority Revenues, Non-State Supported Debt, St. John's University, Series B-1, 0.29% ***, 7/1/2034, Bank of America NA (b)			28,500,000		28,500,000
New York, State Dormitory Authority Revenues, State Supported Debt, City University of New York, Series C, 0.31% ***, 7/1/2031, Bank of America NA (b)			29,900,000		29,900,000
New York, State Energy Research & Development Authority, Pollution Control Revenue, NY State Electric & Gas, Series C, 0.25% ***, 6/1/2029, Wells Fargo Bank NA (b)			13,200,000		13,200,000
New York, State Housing Finance Agency Revenue, 100 Maiden Lane Properties, Series A, 0.24% ***, 5/15/2037			42,660,000		42,660,000
New York, State Housing Finance Agency Revenue, 316 Eleventh Avenue Housing, Series A, AMT, 0.27% ***, 5/15/2041			47,800,000		47,800,000
New York, State Housing Finance Agency Revenue, 320 West 38th Street, Series B, 0.3% ***, 5/1/2042, Wachovia Bank NA (b)			5,000,000		5,000,000
New York, State Local Government Assistance Corp., Series B-3V, 0.27% ***, 4/1/2024			32,025,000		32,025,000
New York, State Mortgage Agency, Homeowner Mortgage Revenue, Series 142, AMT, 0.33% ***, 10/1/2037			14,200,000		14,200,000
New York, Wells Fargo Stage Trust, Series 2009-75C, 144A, 0.27% ***, 5/1/2031			20,505,000		20,505,000
New York City, NY, Housing Development Corp., Multi-Family Rent Housing Revenue, 155 West 21st Street Development, Series A, AMT, 0.25% ***, 11/15/2037			7,300,000		7,300,000
New York City, NY, Housing Development Corp., Residential Revenue, Queens College, Series A, 0.27% ***, 6/1/2043, RBS Citizens NA (b)			13,000,000		13,000,000
New York City, NY, Municipal Water Finance Authority, Water & Sewer Systems Revenue, Series C, 0.31% ***, 6/15/2033			17,600,000		17,600,000
New York, NY, General Obligation:
	Series A-5, 0.26% ***, 8/1/2031, Bank of Nova Scotia (b)		14,320,000		14,320,000
	Series H-2, 0.26% ***, 3/1/2034, Bank of New York (b)		21,095,000		21,095,000
	Series G-4, 0.28% ***, 3/1/2039		65,000,000		65,000,000
	Series J12, 0.38% ***, 8/1/2029		32,770,000		32,770,000
Norfolk, VA, General Obligation, 0.27% ***, 8/1/2037			11,640,000		11,640,000
North Carolina, Capital Facilities Finance Agency, Exempt Facilities Revenue, Republic Services, Inc., 0.31% ***, 9/1/2025, Bank of America NA (b)			5,000,000		5,000,000
North Texas, Higher Education Authority, Inc., Student Loan Revenue, Series A, AMT, 0.28% ***, 12/1/2038, Lloyds TSB Bank PLC (b)			8,600,000		8,600,000
North Texas, Tollway Authority Revenue, Series D, 0.27% ***, 1/1/2049, JPMorgan Chase Bank (b)			27,000,000		27,000,000
Ohio, Housing Finance Agency, Mortgage Revenue, Residential Mortgage Backed, Series D, AMT, 0.3% ***, 9/1/2036			45,000,000		45,000,000
Ohio, State Higher Educational Facility Commission Revenue, University Hospitals Health System, Inc., Series C, 0.25% ***, 1/15/2035, Wells Fargo Bank NA (b)			33,125,000		33,125,000
Ohio, State Hospital Facility, Series 3591, 144A, 0.3% ***, 1/1/2017			15,000,000		15,000,000
Oklahoma, State Turnpike Authority Revenue, Series C, 0.26% ***, 1/1/2028			16,860,000		16,860,000
Orange County, FL, Health Facilities Authority Revenue, Adventist Health Sunbelt, 0.28% ***, 11/15/2026, Wells Fargo Bank NA (b)			8,550,000		8,550,000
Oregon, State Veterans Welfare:
	Series 88B, 0.29% ***, 12/1/2041		5,700,000		5,700,000
	Series B, 0.3% ***, 12/1/2045		7,600,000		7,600,000
Philadelphia, PA, Airport Revenue, Series C, AMT, 0.27% ***, 6/15/2025, TD Bank NA (b)			19,485,000		19,485,000
Pinellas County, FL, Health Facilities Authority Revenue, Baycare Health Systems, Series A2, 0.29% ***, 11/1/2038, Northern Trust Co. (b)			9,750,000		9,750,000
Port of Tacoma, WA, AMT, 0.32% ***, 12/1/2036, Banco Bilbao Vizcaya (b)			99,400,000		99,400,000
Rhode Island, Health & Educational Building Corp., Higher Education Facility Revenue, Rhode Island School of Design, Series B, 0.25% ***, 8/15/2036, Bank of America NA (b)			14,100,000		14,100,000
Riverside County, CA, Certificates of Participation, Public Safety, Communication & Woodcrest Library, 0.3% ***, 11/1/2039, Bank of America NA (b)			5,000,000		5,000,000
Salem, OH, Hospital Revenue, Salem Community Hospital, 0.3% ***, 9/1/2035, JPMorgan Chase Bank (b)			8,130,000		8,130,000
San Francisco, CA, Bay Area Toll Authority, Toll Bridge Revenue, Series D-1, 0.27% ***, 4/1/2045			40,000,000		40,000,000
San Francisco, CA, City & County Airports Commission, International Airport Revenue, Series A-3, AMT, 0.3% ***, 5/1/2030, JPMorgan Chase Bank (b)			13,000,000		13,000,000
Sarasota County, FL, Public Hospital District Revenue, Sarasota Memorial Hospital, Series B, 0.27% ***, 7/1/2037, Bank of America NA (b)			20,000,000		20,000,000
Southern California, Metropolitan Water District, Waterworks Revenue, Series B, 0.27% ***, 7/1/2028			7,000,000		7,000,000
St. Paul, MN, Housing & Redevelopment Authority, Health Care Revenue, Allina Health Systems, Series C, 0.23% ***, 11/15/2035, Wells Fargo Bank NA (b)			21,000,000		21,000,000
Tarrant County, TX, Cultural Education Facilities Finance Corp., Retirement Facilities, Northwest Senior Edgemere Project, Series B, 144A, 0.27% ***, 11/15/2036, LaSalle Bank NA (b)			9,505,000		9,505,000
Texas, Alliance Airport Authority, Inc., Special Facilities Revenue, Series 2088, 144A, AMT, 0.29% ***, 4/1/2021			24,570,000		24,570,000
Texas, State Taxable Public Finance Authority, 0.28%, 5/13/2010			8,400,000		8,400,000
Texas, State Veterans Housing Assistance Fund II, Series C, 0.25% ***, 6/1/2031			11,700,000		11,700,000
Texas, University of Houston Revenues, Consolidated Systems, 0.26% ***, 2/15/2024			7,605,000		7,605,000
Travis County, TX, Health Facilities Development Corp., Retirement Facilities Revenue, Longhorn Village Project, Series B, 0.29% ***, 7/1/2037, Bank of Scotland (b)			38,940,000		38,940,000
University of Chicago, 0.219%, 4/8/2010			21,500,000		21,499,080
University of Houston, 0.22%, 4/29/2010			17,268,000		17,268,000
University of Texas, Financing Systems Revenues, Series B, 0.22% ***, 8/1/2039			61,600,000		61,600,000
Utah, Water Finance Agency Revenue, Series B-3, 0.29% ***, 7/1/2036			41,800,000		41,800,000
Vermont, Educational & Health Buildings, Financing Agency Revenue, Norwich University Project, 0.26% ***, 9/1/2038, TD Bank NA (b)			17,500,000		17,500,000
Washington, State Higher Education Facilities Authority Revenue, Seattle University Project, Series A, 0.29% ***, 5/1/2028, US Bank NA (b)			8,905,000		8,905,000
Washington, Wells Fargo Stage Trust, Series 21C, 144A, 0.27% ***, 12/1/2037			10,390,000		10,390,000
West Virginia, State Hospital Finance Authority Revenue, Cabell Huntington Hospital, Series A, 0.27% ***, 1/1/2034, Branch Banking & Trust (b)			13,480,000		13,480,000
Wisconsin, Housing & Economic Development Authority Revenue, Series A, 0.34% ***, 5/1/2042			14,045,000		14,045,000
Wisconsin, Housing & Economic Development Authority, Home Ownership Revenue, Series B, 0.22% ***, 3/1/2033 (b)			15,975,000		15,975,000
Wisconsin, State Health & Educational Facilities Authority Revenue, Aspirus Wausau Hospital, 0.29% ***, 8/15/2036, JPMorgan Chase Bank (b)			14,985,000		14,985,000

Total Municipal Bonds and Notes (Cost $2,544,659,216)				2,544,659,216
	Repurchase Agreements 2.0%
Banc of America Securities LLC, 0.02%, dated 3/31/2010, to be repurchased at $124,675,157 on 4/1/2010 (d)			124,675,088		124,675,088
BNP Paribas, 0.005%, dated 3/31/2010, to be repurchased at $164,762,674 on 4/1/2010 (e)			164,762,651		164,762,651
The Goldman Sachs & Co., 0.12%, dated 3/30/2010, to be repurchased at $500,013,333 on 4/7/2010 (f)			500,000,000		500,000,000

Total Repurchase Agreements (Cost $789,437,739)				789,437,739

For information on the Portfolio's policies regarding the valuation of investments and other significant accounting policies, please refer to the Portfolio's most recent semi-annual or annual financial statements.
*	Floating rate notes are securities whose yields vary with a designated market index or market rate, such as the coupon-equivalent of the US Treasury bill rate. These securities are shown at their current rate as of March 31, 2010.
**	Annualized yield at time of purchase; not a coupon rate.
***	Variable rate demand notes are securities whose interest rates are reset periodically at market levels. These securities are often payable on demand and are shown at their current rates as of March 31, 2010.
†	The cost for federal income tax purposes was $38,650,467,995.
(a)	Government-backed debt issued by financial companies or government sponsored enterprises.
(b)	Security incorporates a letter of credit from the bank listed.
(c)	Bond is insured by one of these companies:

Insurance Coverage		As a % of Total Investment Portfolio
National Public Finance Guarantee Corp.			0.03

Many insurers who have traditionally guaranteed payment of municipal issues have been downgraded by the major rating agencies.
(d)	Collateralized by:

Principal Amount ($)		Security	Rate (%)		Maturity Date	Collateral Value ($)
	89,263,126	Federal Home Loan Mortgage Corp.		4.5	1/1/2025-3/1/2036		91,489,828
	35,266,723	Federal National Mortgage Association		3.943	9/1/2039		36,567,013
Total Collateral Value							128,056,841

(e)	Collateralized by $161,157,000 US Treasury Inflation-Indexed Note, 1.875%, maturing on 7/15/2019 with a value of $168,057,908.
(f)	Collateralized by:

Principal

Amount ($)

Security

Rate (%)

Maturity Date

Collateral

Value ($)

526,699,188

Federal National Mortgage Association-Principal Only

Zero Coupon

11/25/2039

456,184,701

55,588,560

Government National Mortgage Association

4.5-5.5

1/15/2039-11/15/2039

58,244,278

Total Collateral Value

514,428,979

144A: Security exempt from registration under Rule 144A of the Securities Act of 1933. These securities may be resold in transactions exempt from registration, normally to qualified institutional buyers.

AMT: Subject to alternative minimum tax.

FDIC: Federal Deposit Insurance Corp.

Principal Only: Principal Only (PO) bonds represent the “principal only” portion of payments on a pool of underlying mortgages or mortgage-backed securities.

Fair Value Measurements

Various inputs are used in determining the value of the Portfolio's investments. These inputs are summarized in three broad levels. Level 1 includes quoted prices in active markets for identical securities. Level 2 includes other significant observable inputs (including quoted prices for similar securities, interest rates, prepayment speeds, and credit risk). Level 3 includes significant unobservable inputs (including the Portfolio's own assumptions in determining the fair value of investments). The inputs or methodology used for valuing securities are not necessarily an indication of the risk associated with investing in those securities. Securities held by a money market fund are reflected as Level 2 because the securities are valued at amortized cost (which approximates fair value) and, accordingly, the inputs used to determine value are not quoted prices in an active market.

The following is a summary of the inputs used as of March 31, 2010 in valuing the Portfolio's investments.

	Level 1		Level 2		Level 3		Total
Assets
Investments in Securities (g)	$	—	$	38,650,467,995	$	—	$	38,650,467,995
Total	$	—	$	38,650,467,995	$	—	$	38,650,467,995

(g)	See Investment Portfolio for additional detailed categorizations.

ITEM 2.	CONTROLS AND PROCEDURES

	(a) The Chief Executive and Financial Officers concluded that the Registrant’s Disclosure Controls and Procedures are effective based on the evaluation of the Disclosure Controls and Procedures as of a date within 90 days of the filing date of this report.

	(b) There have been no changes in the registrant’s internal control over financial reporting that occurred during the registrant’s last fiscal quarter that has materially affected, or is reasonably likely to materially affect, the registrant’s internal controls over financial reporting.

ITEM 3.	EXHIBITS

	Certification pursuant to Rule 30a-2(a) under the Investment Company Act of 1940 (17 CFR 270.30a-2(a)) is filed and attached hereto as Exhibit 99.CERT.

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934 and the Investment Company Act of 1940, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

Registrant:	DWS Money Market Series, a series of DWS Money Market Trust

By:	/s/Michael G. Clark Michael G. Clark President

Date:	May 21, 2010

Pursuant to the requirements of the Securities Exchange Act of 1934 and the Investment Company Act of 1940, this report has been signed below by the following persons on behalf of the registrant and in the capacities and on the dates indicated.

Registrant:	DWS Money Market Series, a series of DWS Money Market Trust

By:	/s/Michael G. Clark Michael G. Clark President

Date:	May 21, 2010



By:	/s/Paul Schubert Paul Schubert Chief Financial Officer and Treasurer

Date:	May 21, 2010