EXHIBIT 21

3M COMPANY
AND CONSOLIDATED SUBSIDIARIES (PARENT AND SUBSIDIARIES)
AS OF December 31, 2003

Name of Company   Organized Under
Laws of		   Percentage of
Voting Securities
Beneficially Owned
by Registrant
Registrant  
3M Company   Delaware  
Consolidated subsidiaries of the Registrant:
Dyneon LLC   Delaware   100
3M Financial Management Company   Delaware   100
3M Innovative Properties Company   Delaware   100
3M Investment Management Corporation   Delaware   100
3M Unitek Corporation   California   100
3M Touch Systems, Inc.   Massachusetts   100
3M Precision Optics, Inc.   Ohio   100
3M Argentina S.A.C.I.F.I.A.   Argentina   100
3M Australia Pty. Limited   Australia   100
3M Oesterreich GmbH   Austria   100
3M Belgium S.A./N.V.   Belgium   100
Seaside Insurance Limited   Bermuda   100
3M do Brasil Limitada   Brazil   100
3M Canada Company   Canada   100
3M China Limited   China   100
3M Trading Company Wai Gao Qiao   China   100
3M A/S   Denmark   100
Suomen 3M Oy   Finland   100
3M France, S.A.   France   100
3M Sante Laboratory   France   100
Dyneon GmbH   Germany   100
Inter-Unitek GmbH   Germany   100
Quante AG   Germany   99
Quante Holding GmbH   Germany   100
3M Deutschland GmbH   Germany   100
3M ESPE   Germany   100
3M German Holdings GmbH   Germany   100
3M Hong Kong Limited   Hong Kong   100
3M Italia Finanziaria S.p.A.   Italy   100
Sumitomo 3M Limited   Japan   75
3M Health Care Limited   Japan   87.5
3M Korea Limited   Korea   100
3M Mexico, S.A. de C.V.   Mexico   100
Corporate Services B.V.   Netherlands   100
3M Nederland B.V.   Netherlands   100
3M (New Zealand) Limited   New Zealand   100
3M Norge A/S   Norway   100
3M Puerto Rico, Inc.   Puerto Rico   100
3M Singapore Private Limited   Singapore   100
3M Technologies Private Limited   Singapore   100
3M South Africa (Proprietary) Limited   South Africa   100
3M Espana, S.A.   Spain   100
3M Svenska AB   Sweden   100
3M (East) A.G.   Switzerland   100
3M (Schweiz) A.G.   Switzerland   100
3M Taiwan Limited   Taiwan   100
3M Thailand Limited   Thailand   100
3M Gulf Ltd.   United Arab Emirates   100
3M United Kingdom Holdings P.L.C.   United Kingdom   100
3M Venezuela, S.A.   Venezuela   100

NOTE: Subsidiary companies excluded from the above listing, if considered in the aggregate, would not constitute a significant subsidiary.