3M CO — Director's Dealing 2009

May 1, 2009

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: 3M CO (MMM)
CIK: 0000066740
Period of Report: 2009-04-30

Reporting Person: PALENSKY FRED J (EXEC VP R&D & CHF TECH OFF)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2009-04-30	Common Stock	M	2104	$47.50	Acquired	64108	Direct
2009-04-30	Common Stock	F	1735	$57.60	Disposed	62373	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2009-04-30	Incentive Stock Option (Right to Buy)	$47.50	M	2104	Disposed	2009-05-10	Common Stock (2104)	Direct

Holdings (Non-Derivative)

Security	Shares	Ownership
Common Stock	162	Indirect

Footnotes

F1: Includes shares acquired during the fiscal year pursuant to the 3M Voluntary Investment Plan.