A vehicular headlamp includes a semiconductor light emitting device that faces in a direction substantially perpendicular to a forward direction, a reflector that is formed like a curved surface so as to surround the semiconductor light emitting device, has an opening at its front, has its optical center on the semiconductor light emitting device, and reflects forward light generated by the semiconductor light emitting device, and a light transmitting member that is formed so as to cover the semiconductor light emitting device. Here, the light transmitting member includes a cover member that covers the semiconductor light emitting device and transmits at least apart of the light generated by the semiconductor light emitting device, and a deflection member that covers front of the semiconductor light emitting device and deflects forward a part of the light generated by the semiconductor light emitting device.