Combined service brake and spring-loaded brake cylinder (1) for a commercial vehicle comprises an intermediate piece (4) arranged between the housing (21) of the service brake cylinder (2) and the housing (31) of the spring-loaded brake cylinder (3) and separating the pressure space of the brake cylinders from one another. The housings overlap the outer periphery of the intermediate piece and are fitted together so that the intermediate piece is held by interlocking in the axial direction. Preferred Features: The housings are interlocked together, preferably by flanging.
