A brake cylinder is provided for vehicle brakes, in particular for commercial vehicles brakes, that is equipped with a brake cylinder housing, in which a spring-loaded piston, a service brake piston, a spring-loaded spring and a piston return spring are arranged. The brake cylinder is simple to construct and extremely compact. The spring-loaded piston is in a primary chamber of the brake cylinder and is arranged between the service brake piston and a front side of the brake cylinder housing having the compressed air connections.