3M CO — Director's Dealing 2010

May 3, 2010

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: 3M CO (MMM)
CIK: 0000066740
Period of Report: 2010-04-30

Reporting Person: Lalor Angela S (VICE PRESIDENT HR)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2010-04-30	Common Stock	S	3834	$88.70	Disposed	4369	Direct

Footnotes

F1: Includes shares acquired under 3M's General Employee Stock Purchase Plan; includes shares acquired under 3M's Dividend Reinvestment Program.