A motor vehicle includes at least one displaceable roof section, which when closed abuts the windscreen frame at the front of the vehicle and whose lateral outer areas respectively abut a support. The supports can be relocated in lateral columns of the windscreen frame, where the ends of the supports at the front of the vehicle and the section of the supports lying in the exit region of the lateral column are guided without play in a housing channel that is formed by the respective lateral column, by a respective roller bearing, at a defined distance from the wall of the receiving channel. An optimized guidance system and stability are achieved., if the end of the support at the rear of the vehicle is held in a central manner in a locking device on a rear roof section. The locking device is configured with a cylindrical fastening element comprising a centering recess, in which a rocker-mounted locking lever, designed to engage in a cavity of the support, is located. Alternatively, a longitudinal slide element, which is connected to a snap-in element, can be located in the fastening element. When displaced, the slide element causes the snap-in element to engage in a snap-in cavity on the support or releases the cavity.