Inflating device for a vehicle occupant restraint system

The inflation device for a motor vehicle's occupant restraint system has a cord-form propellant string (20) guided through the housing (30) of a second pyrotechnic gas generator (14). The cord-form propellant string and propellant elements (32) in the housing of the second gas generator are interconnected so that the igniting of the propellant elements takes place by the combustion products released by the propellant string of a first pyrotechnic gas generator (12).