An illumination device to be mounted on a vehicle includes a light source, an optical member, a holder, a first reflector, a first shade, a driving source, a power feeding member, a second reflector, a second shade, and a third shade. The second reflector is disposed between the optical member and the first shade and configured to reflect a part of the light reflected by the first reflector toward the optical member. The second shade is disposed between the optical member and the first shade so as to block a part of the light which is not blocked by the first shade. The third shade disposed to block sunlight which passes through the optical member and reaches at least one of the holder and the power feeding member. The second reflector, the second shade and the third shade are parts of one-piece component formed of the same material.