Motorcycle head light device

To provide a motorcycle head light device in which a position light bulb cannot be directly seen from the outside thereby the outer appearance of the head light device upon turning-on and turning-off of the position light can be improved, and a distinction between the outer appearance upon turning-on of the head light and that upon turning-on of the position light can be easily made, further, the outer appearance upon turning-on of the position light can be arbitrarily set, and the outer appearance of the head light device can be improved. The head light device has a head light bulb 61, a position light bulb 62 provided around the head light bulb 61, a reflector 53 to reflect bulb light of the head light bulb 61, and an extension 70 covering the perimeter of the reflector 53. The extension 70 covers a position in front of the position light bulb 62, and the extension 70 is provided with openings 75, 83 and 85, and reflection members 76, 84 and 86 to guide the bulb light of the position light bulb 62 to the outside.