3M CO — Director's Dealing 2004

Oct 25, 2004

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: 3M CO (MMM)
CIK: 0000066740
Period of Report: 2004-10-21

Reporting Person: IHLENFELD JAY V (VICE PRESIDENT R&D)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2004-10-21	Common Stock	M	828	$45.85	Acquired	24569	Direct
2004-10-21	Common Stock	F	491	$77.165	Disposed	24078	Direct
2004-10-21	Common Stock	M	1172	$31.5175	Acquired	25250	Direct
2004-10-21	Common Stock	F	478	$77.165	Disposed	24772	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2004-10-21	Incentive Stock Option (right to buy)	$31.5175	M	1172	Disposed	2006-05-14	Common Stock (1172)	Direct
2004-10-21	Incentive Stock Option (right to buy)	$45.85	M	828	Disposed	2007-05-13	Common Stock (828)	Direct

Holdings (Non-Derivative)

Security	Shares	Ownership
Common Stock	2402	Indirect