In a head lamp 1, relative positions of a laser light guide path in a tapered light guide section 20 and a parabolic mirror 5 are fixed. An optical fiber 10 and the tapered light guide section 20 are each provided so as to have a receiving end part where laser light is received and an emitting end part where laser light is emitted. The emitting end part of the optical fiber 10 is located near the receiving end part of the tapered light guide section 20.