Provided is a lamp unit including a reflector that reflects and controls light emitted from first and second light emitting elements. The reflector includes first and second reflective surfaces. In addition, the light emitted from the first light emitting element in a headlamp lighting mode (a first lighting mode) is incident on the first reflective surface and not on the second reflective surface, and the light emitted from the second light emitting element in a daytime running lamp lighting mode (a second lighting mode) is incident on the first and second reflective surfaces.