In a door mirror assembly for a vehicle, a case is supported at a door mirror stay provided at a vehicle door and mounted to a door mirror visor, whereby the door mirror visor is disposed above the door mirror stay. An overlap portion provided at the case and an overlap portion provided at an opening of the door mirror visor are overlapped one above the other and mounted, and a gap between the opening of the door mirror visor and the lower part of the case is thus stopped. Therefore, generation of wind noises caused by wind entering through the gap between the opening of the door mirror visor and the lower part of the case while a vehicle is in motion can be prevented.