An illumination lamp including a projection lens 12 and primary and secondary light source units 14, 16 are disposed rearwards of a projection lens 12 disposed on an optical axis Ax, which extends in a longitudinal direction of a lamp. The primary light source unit 14 includes a primary reflector 34 and an upwardly oriented reflecting surface 36a which extends rearwards from the rear focal point F of the projection lens 12. The secondary light source unit 16 includes a secondary reflector 44 that reflects light upwards so as to be caused to substantially converge on a location lying near the rear focal point F on a downwardly oriented reflecting surface 46a, which extends obliquely downwards from a front end edge of the upwardly oriented reflecting surface 36a towards a rear of the lamp.