EXHIBIT 23.1

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We consent to the incorporation by reference in Registration Statement No.
333-72583, 333-87427, 333-40652, 333-56712, 333-59786, 333-66078, 333-67446,
333-71966, 333-76880, 333-116510, and 333-85654 on Form S-3, and Registration
Statement No. 333-16529, 333-34002, 333-37366, 333-59200, 333-106733,
333-117460, 333-117461, and 333-106729 on Form S-8 of Calpine Corporation of our
report dated March 10, 2003 (October 21, 2003 as to paragraph two of Note 10 and
March 22, 2004 as to paragraphs six and eight of Note 10), which report
expresses an unqualified opinion and includes emphasis relating to the adoption
of new accounting standards in 2002 and 2001 and divestitures, appearing in this
Form 10-K/A of Calpine Corporation.

/s/ DELOITTE & TOUCHE LLP

San Jose, California
September 10, 2004