Method for manufacturing a gas generator

For manufacturing a gas generator, a tubular body having an opening in a circumferential wall and a housing part having an attachment end are provided. The geometry of a proximate rim of the opening and that of the attachment end are coordinated such that a first contact region encircling the opening and a second contact region on the attachment end, which is circumferentially closed, are formed. The housing part is placed onto the tubular body such that the first contact region is in contact with the second contact region. Then the body and the housing part are joined to each other by capacitor discharge welding.