GAS GENERATOR

The present invention provides a gas generator (10), including: a pressurized gas chamber (20) formed by a cylindrical pressurized gas chamber housing(22) and being filled with the pressurized gas; a combustion chamber (30) connected to a first end portion of the pressurized gas chamber (20) and including an ignition device (34) and a gas generating agent (36) therein, a diffuser portion (50) connected to a second end portion of the pressurized gas chamber (20) and provided with a gas discharge port (52); a first rupturable plate(40)blocking a first communication passage (38)between the pressurized gas chamber (20) and the combustion chamber (30); a second rupturable plate (58) blocking a second communication passage (56) between the pressurized gas chamber (20) and the diffuser portion (50); and afilter (60) disposed and positioned in the pressurized gas chamber (20) to cover the second rupturable plate (58), the filter (60) allowing, during actuation, the combustion gas from the combustion chamber (30) and the pressurized gas to pass therethrough and be discharged therefrom in response to rupturing the second rupturable plate (58).