3M CO — Director's Dealing 2004

May 10, 2004

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: 3M CO (MMM)
CIK: 0000066740
Period of Report: 2004-05-06

Reporting Person: WIENS HAROLD J (EXEC VP INDUSTRIAL)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2004-05-06	Common Stock	M	4790	$46.675	Acquired	40529	Direct
2004-05-06	Common Stock	F	2636	$84.79	Disposed	37893	Direct
2004-05-06	Common Stock	F	704	$84.79	Disposed	37189	Direct
2004-05-06	Common Stock	M	43096	$47.5	Acquired	80285	Direct
2004-05-06	Common Stock	F	24142	$84.79	Disposed	56143	Direct
2004-05-06	Common Stock	F	6197	$84.79	Disposed	49946	Direct
2004-05-06	Common Stock	M	710	$48.4	Acquired	50656	Direct
2004-05-06	Common Stock	F	405	$84.79	Disposed	50251	Direct
2004-05-06	Common Stock	F	99	$84.79	Disposed	50152	Direct
2004-05-06	Common Stock	M	4812	$48.4	Acquired	54964	Direct
2004-05-06	Common Stock	F	2746	$84.79	Disposed	52218	Direct
2004-05-06	Common Stock	F	675	$84.79	Disposed	51543	Direct
2004-05-06	Common Stock	M	732	$48.4	Acquired	52275	Direct
2004-05-06	Common Stock	F	417	$84.79	Disposed	51858	Direct
2004-05-06	Common Stock	F	102	$84.79	Disposed	51756	Direct
2004-05-06	Common Stock	M	5396	$47.475	Acquired	57152	Direct
2004-05-06	Common Stock	F	3021	$84.79	Disposed	54131	Direct
2004-05-06	Common Stock	F	776	$84.79	Disposed	53355	Direct
2004-05-06	Common Stock	M	526	$47.475	Acquired	53881	Direct
2004-05-06	Common Stock	F	294	$84.79	Disposed	53587	Direct
2004-05-06	Common Stock	F	75	$84.79	Disposed	53512	Direct
2004-05-06	Common Stock	M	468	$58.625	Acquired	53980	Direct
2004-05-06	Common Stock	F	323	$84.79	Disposed	53657	Direct
2004-05-06	Common Stock	F	47	$84.79	Disposed	53610	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2004-05-06	Non-Qualified Stock Option (right to buy)	$46.675	M	4790	Disposed	2008-05-12	Common Stock (4790)	Direct
2004-05-06	Non-Qualified Stock Option (right to buy)	$47.475	M	5396	Disposed	2006-05-14	Common Stock (5396)	Direct
2004-05-06	Non-Qualified Stock Option (right to buy)	$47.475	M	526	Disposed	2007-05-13	Common Stock (526)	Direct
2004-05-06	Non-Qualified Stock Option (right to buy)	$47.5	M	43096	Disposed	2009-05-10	Common Stock (43096)	Direct
2004-05-06	Non-Qualified Stock Option (right to buy)	$48.4	M	710	Disposed	2004-05-07	Common Stock (710)	Direct
2004-05-06	Non-Qualified Stock Option (right to buy)	$48.4	M	4812	Disposed	2005-05-06	Common Stock (4812)	Direct
2004-05-06	Non-Qualified Stock Option (right to buy)	$48.4	M	732	Disposed	2006-05-12	Common Stock (732)	Direct
2004-05-06	Non-Qualified Stock Option (right to buy)	$58.625	M	468	Disposed	2007-05-13	Common Stock (468)	Direct
2004-05-06	Non-Qualified Stock Option (right to buy)	$84.8	A	3421	Acquired	2005-05-06	Common Stock (3421)	Direct
2004-05-06	Non-Qualified Stock Option (right to buy)	$84.8	A	3797	Acquired	2006-05-12	Common Stock (3797)	Direct
2004-05-06	Non-Qualified Stock Option (right to buy)	$84.8	A	519	Acquired	2006-05-12	Common Stock (519)	Direct
2004-05-06	Non-Qualified Stock Option (right to buy)	$84.8	A	369	Acquired	2007-05-11	Common Stock (369)	Direct
2004-05-06	Non-Qualified Stock Option (right to buy)	$84.8	A	370	Acquired	2007-05-11	Common Stock (370)	Direct
2004-05-06	Non-Qualified Stock Option (right to buy)	$84.8	A	3340	Acquired	2008-05-12	Common Stock (3340)	Direct
2004-05-06	Non-Qualified Stock Option (right to buy)	$84.8	A	30339	Acquired	2009-05-11	Common Stock (30339)	Direct

Holdings (Non-Derivative)

Security	Shares	Ownership
Common Stock	1884	Indirect

Footnotes

F1: The indirectly-held common stock holding (401k/PAESOP) reported in Table I includes shares acquired during the fiscal year pursuant to the 3M Voluntary Investment Plan.
The directly-held common stock holding reported in Table I includes shares acquired pursuant to 3M's Dividend Reinvestment Program in transactions exempt from Section 16; this total also includes shares acquired during the fiscal year pursuant to 3M's General Employee Stock Purchase Plan.