The invention relates to an air bellows for a pneumatic spring, in particular of a commercial vehicle, the air bellows including an axle-side region and a body-side region, wherein the axle-side region is arranged on a plunger and movable by a compression or extension movement between a first, compressed position and a second, extended position, and further including an interior space adapted to be filled with compressed air via a compressed air opening that is connectable to a compressed air line. The air bellows further comprises a valve connected to the atmosphere for ventilating the interior space, wherein by applying compressed air present in the interior space to the valve the valve is moved to a closed position.