fig1 a the state of rest with a non activated gas bag is illustrated in which the central part 18 lies against the gas bag section 24 such that it presses it against the holding device 12 fig1 b shows the gas bag module with inflated gas bag with the central part 18 of the module covering spaced apart from the holding device as soon as an accident is detected gas flows out from the gas generator 10 into the initially folded gas bag 28 and begins to inflate it on opening of the module covering the central part 18 is separated from the remaining parts of the module covering and is moved from the gas bag 28 in the region of the gas bag section 24 in an axial direction a away from the gas generator 10 in other words this means that the central part 18 is moved here towards the vehicle occupant through the guiding of the pin element 20 in the sleeve element 16 it is ensured that the central part 18 can not swerve laterally when the pin end section 22 reaches the lower end of the sleeve element 16 the movement of the central part 18 towards the vehicle occupant is stopped the cross.