Abstract: A cover arrangement for a truck box is provided by a pair of rigid cover panels which extend along the length of the truck box and meet at the center line. The cover panels are pivotally movable from the closed abutting position to an open position alongside side walls of the truck box on upper and lower levers with the upper levers interconnected by a torque tube rotatably mounted on the panel. The panel is formed by a framework having transverse struts and longitudinal weight support tubes. The upper levers, one arranged at each end of the panel, are spring biased and latched into the closed position. A gable end structure which is inclined inwardly provides a flange for supporting the ends of the cover panel in a manner which provides a seal and reduces air pressure.