Gas generator

The gas generator has an inner and outer generator stages (I,II) (20,30), each of which has igniter(s) (22,32), propellant charge(s) and combustion chamber(s) (24,34) in their pressure housings (26,36). Both the generator stages are at least partially arranged in a common filter housing (56) together with a common filter unit (50) arranged outside pressure housing of the outer generator stage.