Abstract: A floor assembly for a cargo space of an automotive vehicle includes a floor support adapted to be mounted in the cargo space. A floor panel is mounted on the floor support for movement along a predetermined path of travel from a first position totally within the cargo space to an extended position at least partially outside the vehicle. Locking mechanism releasably locks the floor panel in the desired position. The locking mechanism may also be capable of locking the floor panel in several intermediate positions between the first position and the extended position. The locking mechanism preferably includes locking detents in spaced apart relation along the path of travel, and a locking lever engageable with any one of the detents to lock the floor panel in a selected position.