Abstract: A cargo carrier for temporary attachment atop the bed of a fifth wheel tractor and temporarily replace the trailer includes a mounting frame, means for removably anchoring the mounting frame to the tractor such that the rails encircle the fifth wheel, and an upwardly open container for carrying articles removably secured to the mounting frame. The mounting frame includes a pair of longitudinally extending side rails, and a pair of transversely extending forward and rearward cross-rails. The container includes a bottom, a pair of sidewalls, and a pair of end walls, the walls being generally perpendicular to and removably connected to the bottom and to one another to form an upwardly open rectangular shaped structure.