3M CO — Director's Dealing 2004

May 17, 2004

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: 3M CO (MMM)
CIK: 0000066740
Period of Report: 2004-05-14

Reporting Person: GRENZ M KAY (VICE PRESIDENT HR)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2004-05-14	Common Stock	M	740	$60.725	Acquired	42060	Direct
2004-05-14	Common Stock	F	535	$83.97	Disposed	41525	Direct
2004-05-14	Common Stock	F	66	$83.97	Disposed	41459	Direct
2004-05-14	Common Stock	M	5270	$60.725	Acquired	46729	Direct
2004-05-14	Common Stock	F	3811	$83.97	Disposed	42918	Direct
2004-05-14	Common Stock	F	477	$83.97	Disposed	42441	Direct
2004-05-14	Common Stock	M	7826	$60.725	Acquired	50267	Direct
2004-05-14	Common Stock	F	5659	$83.97	Disposed	44608	Direct
2004-05-14	Common Stock	F	708	$83.97	Disposed	43900	Direct
2004-05-14	Common Stock	M	31700	$58.625	Acquired	75600	Direct
2004-05-14	Common Stock	F	22131	$83.97	Disposed	53469	Direct
2004-05-14	Common Stock	F	3128	$83.97	Disposed	50341	Direct
2004-05-14	Common Stock	M	5639	$61.85	Acquired	55980	Direct
2004-05-14	Common Stock	F	4153	$83.97	Disposed	51827	Direct
2004-05-14	Common Stock	F	485	$83.97	Disposed	51342	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2004-05-14	Non-Qualified Stock Option (right to buy)	$58.625	M	31700	Disposed	2011-05-08	Common Stock (31700)	Direct
2004-05-14	Non-Qualified Stock Option (right to buy)	$60.725	M	740	Disposed	2005-05-06	Common Stock (740)	Direct
2004-05-14	Non-Qualified Stock Option (right to buy)	$60.725	M	5270	Disposed	2006-05-12	Common Stock (5270)	Direct
2004-05-14	Non-Qualified Stock Option (right to buy)	$60.725	M	7826	Disposed	2010-05-09	Common Stock (7826)	Direct
2004-05-14	Non-Qualified Stock Option (right to buy)	$61.85	M	5639	Disposed	2013-05-12	Common Stock (5639)	Direct
2004-05-14	Non-Qualified Stock Option (right to buy)	$84	A	601	Acquired	2005-05-06	Common Stock (601)	Direct
2004-05-14	Non-Qualified Stock Option (right to buy)	$84	A	4288	Acquired	2006-05-12	Common Stock (4288)	Direct
2004-05-14	Non-Qualified Stock Option (right to buy)	$84	A	6367	Acquired	2010-05-07	Common Stock (6367)	Direct
2004-05-14	Non-Qualified Stock Option (right to buy)	$84	A	25259	Acquired	2011-05-06	Common Stock (25259)	Direct
2004-05-14	Non-Qualified Stock Option (right to buy)	$84	A	4638	Acquired	2013-05-13	Common Stock (4638)	Direct

Holdings (Non-Derivative)

Security	Shares	Ownership
Common Stock	3791	Indirect
Common Stock	456	Indirect