Abstract: An improved tarpaulin cover system for truck bodies wherein intermediate portions of the tarpaulin between its ends are slidably secured for longitudinal movement with respect to the truck body on a pair of semi-rigid, non-movable linear fixed support members, the semi-rigid support members being separate and distinct from the movable drive cable by which the lead bow and tarpaulin are moved. The system is adaptable to both truck box and flat deck trailer type bodies. The system according to the present invention makes the tarpaulin system more wind resistant than conventional movable tarpaulin cover systems and provides more safety by maintaining the tarpaulin in position even if the drive cable breaks.