3M CO — Director's Dealing 2004

May 12, 2004

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: 3M CO (MMM)
CIK: 0000066740
Period of Report: 2004-05-11

Reporting Person: MORRISON ROBERT S (Director)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2004-05-11	Common Stock	A	1292	$84.15	Acquired	2785	Indirect

Holdings (Non-Derivative)

Security	Shares	Ownership
Common Stock	3934	Direct

Footnotes

F1: This nonemployee director has elected to defer all or a portion of compensation otherwise payable in cash to a common stock equivalents account under the terms of 3M's Director Compensation Plan and has no voting or investment powers with respect to such account. The indirectly-held common stock holding (by Corporation) reported in Table I includes deferred dividend reinvestment shares acquired pursuant to 3M's Director Compensation Plan.