PURPOSE: To permit adopting a high-mount stop lamp while the aerodynamic characteristics are enhanced.

CONSTITUTION: A corner deflector 9 is installed at a corner part formed at the top of the rear of a car body, and a running wind path 10 is formed between the two members. The body 11 of stop lamp of a high-mount stop lamp device 7 is located in a position around the corner part where a certain gap is reserved relative to the corner deflector 9, and the light emitted by this body 11 of stop lamp is cast onto the corner deflector 9. In that position on the corner deflector 9 which is irradiated with the light from the lamp body 11, a projection lens 12 is installed through which the light is transmitted and projected to back of the car body. This enables locating the lamp body 11 in the position not obstructing largely the area of the running wind path 10.