Press release, May 30, 2006

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DECLARATION OF TRANSACTIONS INVOLVING TREASURY STOCK

In accordance with the regulations regarding share buybacks (Article 241-5 of the general regulations issued by the AMF), Compagnie de Saint-Gobain hereby announces that the following transactions involving treasury stock were carried out between May 22 and May 26, 2006:

Trading date		Number of shares	Weighted average price in euros	Amount in euros
May 22, 2006	bought	0
May 22, 2006	sold	0
May 23, 2006	bought	0
May 23, 2006	sold	0
May 24, 2006	bought	200,000	53.02	10,604,270
May 24, 2006	sold	0
May 25, 2006	bought	131,000	53.40	6,995,007
May 25, 2006	sold	0
May 26, 2006	bought	165,000	54.79	9,039,690
May 26, 2006	sold	0
Total of the period	bought	496,000	53.71	26,638,967
Total of the period	sold	0		0

May 30, 2006