MASCO CORP /DE/ — Director's Dealing 2005

May 11, 2005

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: MASCO CORP /DE/ (MAS)
CIK: 0000062996
Period of Report: 2005-05-09

Reporting Person: ROSOWSKI ROBERT B (V.P. & Treasurer)

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2005-05-09	Employee Stock Option	$30.75	A	20000	Acquired	2015-05-09	Common Stock (20000)	Direct

Footnotes

F1: The foregoing option is exercisable in annual installments 20% one year from the date of grant and 20% annually thereafter for 4 years.

F2: Grant of option under Masco Corporation 1991 Long Term Stock Incentive Plan, in transactions exempt under Rule 16 b-3.