Gas generator

A gas generator, comprising:

• a housing;
• an igniter disposed in the housing;
• a gas generating agent that generates a combustion gas by actuation of the igniter, the gas generating agent being accommodated in the housing;
• one or more first discharge ports provided in the housing and configured to discharge the combustion gas generated in the housing to an outside;
• one or more second discharge ports provided in the housing together with the one or more first discharge ports and configured to discharge the combustion gas generated in the housing to the outside;
• and
• a closing member covering at least one of the one or more first discharge ports and at least one of the one or more second discharge ports together,
• wherein the closing member includes a portion covering the at least one first discharge port and configured to rupture at a first rupture pressure and a portion covering the at least one second discharge port and configured to rupture at a second rupture pressure higher than the first rupture pressure, and
• the closing member includes a breakage assisting portion configured to reduce a strength of the closing member at at least a boundary portion between the at least one first discharge port and the at least one second discharge port.