A drag-reducing pickup truck canopy includes an upper portion having a generally rectangular shape with one long side acting as a front edge and an opposite long side acting as a rear edge, the upper portion having a downward sloping section extending between the front edge and the rear edge, two side portions with one side portion extending downward and tapering outward from each short side of the upper portion, and two support portions extending outward from lower edges of the side portions. The upper portion may include a substantially flat portion adjacent to the front edge and/or a substantially flat portion adjacent the rear edge.