Abstract: A backrest for an ATV which is quickly and easily installed on and removed from a carrier rack of the ATV without requiring any modification to the carrier rack or any other portion of the ATV. Three elongate, substantially flat bars are welded together in end-to-end fashion to form a U-shaped member, and the U-shaped member is releasably attached to the carrier rack of the ATV, with the lower, broad, flat surfaces of the U-shaped member lying flatwise on the upper surface of the carrier rack. An upstanding back cushion is secured to the U-shaped member so that the back cushion can be positioned at selected positions relative to the seat of the ATV.