Patent ID: 8800451

Claim:
A gas generator comprising, a primer member including a mount portion for mounting a primary charge and at least two electrode pins projecting from a bottom surface of the mount portion and igniting the primary charge based on an electric signal passed through the electrode pins, a case charged with a gas generating agent for generating combustion gas upon ignition by the primer member, a holder having a pedestal including a single opening portion through which all the electrode pins are inserted, the pedestal supporting the primer member, and on which the bottom surface of the mount portion is placed with the electrode pins inserted through the opening portion, having a mounting section for fitting a peripheral edge portion of the case, and the mounting section fitting over the case, wherein the primer member is configured so that the mount portion is formed of synthetic resin, the electrode pins are equipped midway with flange portions, and the flange portions are integrally formed in a state embedded inside the mount portion, and the flange portions of the electrode pins are larger in diameter than short sides of the opening portion of the holder and the sum of the sector angles formed by the outer peripheral portions located outside the opening portion of the holder in the axial direction and the electrode pins is made 180 degrees or greater.