The reflection surface of a reflector is formed by a parabolic cylindrical plane extending in the horizontal direction orthogonal to an optical axis. A light emitting element is configured to have five light emitting chips arranged in a T-shape and these light emitting chips are lighted in two lighting modes. In the first lighting mode, a special light emitting chip and a pair of the left and right side special light emitting chips which front end edges are aligned on the focal line of the parabolic cylindrical plane are lighted simultaneously, whereby a light distribution pattern having a narrow vertical width and a prolong shape is formed. In the second lighting mode, a special light emitting chip located at the center portion and two general light emitting chips disposed in series on the backward side thereof are lighted simultaneously, whereby a light distribution pattern having a large vertical width and a prolong shape is formed.