Patent ID: 8157130

Claim:
A gas cartridge comprising: a metal made outer can; a metal made inner bag arranged at inside of the outer can, in which a fuel gas is charged to inside of the metal made inner bag, and a space between the outer can and the inner bag is charged with a compression gas for pressing to crush the inner bag in accordance with consumption of the fuel gas; and a deformation introducing member that is a member separated from both of the outer can and the inner bag and provided on an inner side of the outer can for producing an initial deformation for introducing a deformation of the inner bag when a press force of the compression gas is received, wherein the deformation introducing member includes a first end portion and a second end portion between which a plurality of deformation introducing portions are connected and arranged at intervals, thereby forming a housing to accommodate the inner bag, and wherein radially inner parts of the plurality of deformation introducing portions are in contact with radially outer peripheral parts of the inner bag, respectively.