3M CO — Director's Dealing 2007

May 10, 2007

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: 3M CO (MMM)
CIK: 0000066740
Period of Report: 2007-05-08

Reporting Person: Harlan Joe E (EXEC VP ELECTRO & COMMUN)

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2007-05-08	Non-Qualified Stock Option (right to buy)	$84.78	A	38979	Acquired	2017-05-08	Common Stock (38979)	Direct