Abstract: A topper for the bed of a pickup truck comprises a cover member pivotally supported to one wall of the pickup bed from which the cover member is pivoted between a first position wherein the cover member covers and encloses the bed and a second position wherein the cover member is supported substantially above the bed to provide access thereto. A support arm member is provided with its first end pivotally attached to the opposed side walls of the bed near the rear end of the truck bed. The second end of the support arm member is slidably engaged along the cover member. A spring structure is attached between the cover member and the support arm member and urges the second end of the support member to rotate the support arm member to an upright position. As the support member is rotated upwardly, the rear of the cover member is raised to provide access to the truck bed. In an alternative embodiment, both the front and rear of the cover member are raisable by pivoting front and rear support arm assemblies.