GAS GENERATOR WITH AUTOMATIC FIRING FUNCTION

A gas generator for an air bag which includes a gas generating agent having an automatic igniting function is provided. Since a gas generating agent 9b stored in a second combustion chamber 5b has an automatic igniting function, the gas generating agent 9b automatically ignites in case of a vehicle fire, which is accompanied by the combustion of the gas generating agent 9a and the transfer charge 16a and 16b.