A seating accessory for use in combination with the inside surface of the tailgate of a pickup truck. The accessory includes a generally rectangular sheet sized to be positioned over the lowered tailgate surface and defining two side-by-side upwardly opening concave seating surfaces to accommodate side-by-side seated persons. A backrest is associated with each seating surface and is pivotally moveable between an upright position providing back support for a person sitting on the respective seating surface, and a lowered, stowed position within the concavity of the respective seating surface. The seating access is secured to the tailgate using suitable fasteners coacting with the tailgate.