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: SHARER KEVIN W (Director)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2004-05-11	Common Stock	A	1292	$84.15	Acquired	5360	Indirect

Holdings (Non-Derivative)

Security	Shares	Ownership
Common Stock	9	Direct
Common Stock	866	Indirect

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.

Since the date fo the reporting person's last ownership report, he transferred 866 shares of 3M common stock from the trust to his ex-wife pursuant to a domestic relations order.