PURPOSE: To eliminate the need for a cover part for covering the outer part of a cylinder packed with a high-pressure fire extinguishing gas, to inexpensively produce the above appliance and to make the fire extinguisher itself throw-away.

CONSTITUTION: This appliance is composed of a fixing body 5 which has lower, middle and upper insertion parts 6, 10, 15 communicating with an internal thread part 8 and a horizontal injection hole 8 on the inner side, a supporting part 14 which has a collar part 17 inserted to the respective insertion parts 6, 10, 15, a needle 13 fitted at its bottom and a recessed part at its head, an expanding pin 20, a temp. fuse cap 22 and the cylinder 1 which is packed with the high- pressure fire extinguishing gas.