PURPOSE: To provide a method of fixing a cycle part, an electric part or the like, which eliminate the necessity of use of screws in a conventional method.

CONSTITUTION: A fixture 3 has bent end parts, having a diameter slightly larger than that of an accumulator heat insulator 2. An attaching plate 4 is formed therein with an insertion part cut-out part and a fixing part cut-out part. The fixture 3 is formed thereon a protrusion, and the attaching plate is formed therein with a projection insertion hole. Accordingly, the necessity of a screw may be eliminated due to the spring action of the fixture, thereby it is possible to attach and remove a part by a single manipulation step.