Abstract: This invention is a sliding floor for utility vehicles. The sliding floor consists of longitudinally C-shaped channels disposed at either side of the truck bed and extending parallel to each other. A sliding plate adapted for lengthwise movement to and fro over the floor of the truck is mounted for movement dictated by the channel mounting and acting as race ways for the sliding plate. The sliding plate rests upon rollers interposed between the C-shaped channels which permits the sliding plate to be easily moved inwardly and outwardly of the truck bed. At the back of the sliding floor, stop means are provided to prevent the sliding plate from moving beyond a designated end of the truck bed. A lock is preferably provided that locks the sliding plate in several extended positions. Also support legs are provided to provide surface support for the floor, if desired, when the floor is extended.