Abstract: A truck bed extension which is concealed beneath a truck when not being used is disclosed. The truck bed extension comprises a frame and two wheel assemblies for permitting the extension to be pulled behind a truck. During non-use, an elongated member of the truck bed extension is received by a guide channel to facilitate positioning the truck bed extension beneath the truck. When the truck bed extension is not being used the wheel assemblies rotate up under the truck wheel wells and attach thereto. A locking mechanism secures the truck bed extension in place during use. Optional removable side walls attach to the truck bed extension and may alternatively be used as ramps for loading wheeled-vehicles. A hoist slidably engaging side walls of the truck bed permits heavy and cumbersome materials to be loaded and unloaded.