To provide an outside mirror device for a vehicle capable of fixing a side turn signal lamp 6 to a mirror housing simply and certainly.

A provisionally fixing means 15 for the mirror housing 4 is composed of two plates 18 approximately parallel with the setting direction, and the plates 18 have grooves 17 narrowing toward the setting direction. A provisionally fixing means 16 for the side turn signal lamp 6 is composed of a bite-in part 19 biting into the edge of each groove 17 by setting the side turn signal lamp 6 in the mirror housing 4 and guide-positioning in the setting direction and the first direction, and an abutting plate 20 abutting on the plates 18 and guide-positioning in the second direction.