A bulb 37 and a reflecting plate 40 are disposed in offset relation to a lens 54 so that an optical axis LB1 of a beam, emitted from the bulb 37, and an optical axis LB2 of reflection light, reflected by the reflecting plate 40, can intersect an axis CL of the lens 54 in a forward-rearward direction of a vehicle. Therefore, the beam can be radiated forwardly without directing the lens 54 forwardly. In the case where two reflecting surfaces 41a and 41b of an identical shape are provided symmetrically on the reflecting plate 40, and are arranged in the forward-rearward direction of the vehicle, and there are provided a pair of bulbs 37, a pair of reflecting plates 40 and a pair of lens 54 each pair of which are provided respectively for left and right (two) directions, the pair of reflecting plates, having an identical construction, are used. Therefore, the cost can be reduced, and this also prevents an erroneous operation in which the two reflecting plates are mounted in a reversed manner.