3M CO — Director's Dealing 2007

May 2, 2007

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: 3M CO (MMM)
CIK: 0000066740
Period of Report: 2007-05-01

Reporting Person: STAKE JAMES B (EXEC VP ENTERPRISE SVCS)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2007-05-01	Common Stock	M	2180	$45.85	Acquired	25013	Direct
2007-05-01	Common Stock	F	1205	$82.945	Disposed	23808	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2007-05-01	Incentive Stock Option (right to buy)	$45.85	M	2180	Disposed	2007-05-13	Common Stock (2180)	Direct

Holdings (Non-Derivative)

Security	Shares	Ownership
Common Stock	416	Indirect
Common Stock	1886	Indirect
Common Stock	152	Indirect