The invention relates to a stroke piston for a stroke piston compressor for generating compressed air for a vehicle, more particularly a commercial vehicle. The stroke piston comprises: a piston body with a piston floor (1a), a piston skirt with piston skirt walls (1d) and preferably pin hubs (1c) for receiving a piston pin; and at least two, preferably three piston rings, which can be inserted into circumferential ring grooves (1; 2; 3) of the piston body. Present between each two ring grooves (1; 2; 3) and between the piston floor (1 a) and the first ring groove (1) arranged closest to the piston floor (1a) and the ring groove (3) arranged closest to the piston skirt facing away from the other ring groove or grooves are ridges (3a2; 3a3) of the piston body. At least one of the ridges (3a2; 3a3) of the piston body is recessed at least over a partial section of its ridge height, which is measured parallel to the axis of the piston body, with at least one recess (3b) relative to the diameter of the piston body.