A vehicle passenger safety method in which a gas bag in an airbag module is inflated in between the passenger and parts of the vehicle when a crash occurs. The cover of the gas bag moves away from the passenger before the gas bag is inflated. Preferably, the gas bag and a diffuser, located in between an inflating device and the gas bag, also move away from the passenger. Compressed gas is released from the inflating device into the gas bag only when the above mentioned groups of components have been placed in a set position.