A rear structure of a vehicle includes a flip-up back door for opening and closing an opening formed in the rear part of the vehicle. The back door has lamp fitting recesses, into which rear lamps are fitted, extending inwardly from the ends of the back door in the vehicle width direction which are recessed in a vehicle inner side. The lamp fitting recesses are provided, on its bottom walls, with flow restraint recesses extending in upward and downward directions in the lamp fitting recesses which are recessed in the vehicle inner side. The lamp fitting recesses are provided with, on portions or the lower walls thereof that are located more outwardly in the vehicle width direction than the flow restraint recesses, inclined parts in which lower walls of the lamp fitting recesses are inclined downward toward the rear of the vehicle or the outside in the vehicle width direction.