Auxiliary directional light device for an automobile

An auxiliary directional light device includes left and right auxiliary signal lights (2) that are to be mounted respectively on upper left and right corner portions of a windshield (33) of an automobile (3), and that are to be operated in synchronization with a main directional lighting unit of the automobile (3). The construction as such prevents light emitted by left and right headlights (35) of the automobile (3) from obscuring light emitted by the left and right auxiliary signal lights (2). Alternatively, the light device is mounted on the rear side of a rearview mirror (37).