Abstract: The invention disclosed is a roof bow unit to support a cover for the bed of a truck, trailer or the like. It is comprised of a pair of upwardly angled mounting members each containing a C-shaped socket wherein each member is securable to the lip of the bed of a truck or other vehicle, a pair of connecting end pieces each containing a rounded end each end, shaped to fit within the C-shaped socket of the mounting member and a bendable tube with an opening at each end into which the connecting end pieces are secured. This roof bow unit to support covers provides an inexpensive easy to manufacture a support for covers for truck beds and provides a significant improvement over prior art devices.