Abstract: A door mounted on the edge of a tailgate of a pickup truck that is foldable against the inside surface of the tail gate when the tail gate is vertical or horizontal or is oriented away from the tailgate when the tailgate is horizontal thereby enclosing the bed of the truck when the tailgate is horizontal. The door effectively converts the truck bed from the standard six foot length to the standard eight foot length such as for carrying stack of eight foot panels, without having to tie down the panels, or for carrying loose piles of material. The door panel is detachable when required.