Filed Pursuant to Rule 424(b)(3)

Registration No. 333-85654

PROSPECTUS SUPPLEMENT NO. 17 TO PROSPECTUS DATED JUNE 21, 2002

of

CALPINE CORPORATION

Relating to

Resales by Selling Securityholders

of

4% Convertible Senior Notes

and Shares of Common Stock Issuable Upon Conversion of the Senior Notes

       This Prospectus Supplement supplements the Prospectus dated June 21, 2002, as supplemented to date (the “Prospectus”). This Prospectus Supplement should be read in conjunction with the Prospectus, which is to be delivered by selling securityholders to prospective purchasers along with this Prospectus Supplement. The information in the following table supercedes in part and supplements the information in the relevant section in the Prospectus.

							Shares of
							Common Stock
	Aggregate Principal		Shares of		Shares of		Beneficially
	Amount of Notes		Common		Common		Owned After
	Beneficially Owned		Stock		Stock		Completion of
Selling Holder	and Offered		Beneficially Owned		Offered		the Offering
KBC Financial Products USA, Inc.	$	3,000,000		166,020		166,020		0

Prospectus Supplement dated July 15, 2003