Abstract: A side gas bag arrangement for a vehicle occupant restraint system of a motor vehicle is provided. The side gas bag arrangement comprising at least one side gas bag inflatable for the protection of a vehicle occupant, which with a side gas bag arrangement mounted in the vehicle and in the inflated condition of the side gas bag extends along a long side of the vehicle, wherein the side gas bag includes at least one inflatable chamber which is formed such that in the inflated condition of the side gas bag it extends over a side window of the vehicle and in direction of the vehicle floor beyond a door sill adjoining the side window; and sealing means which at least seal a partial region of the side gas bag, so that gas is prevented from flowing out of this partial region to the outside.