Abstract: A car lamp includes a housing provided with an optical reflecting surface for reflecting light produced by LED lamps to have the light passing through an optical panel and projected outward. The car lamp has a heat-dissipating member fixed between the housing and the optical panel and installed thereon with LED lamps. The heat-dissipating member has its front end disposed with an auxiliary heat sink that extends in a reserved space of the optical panel and firmly combined with the optical panel. Thus, the auxiliary heat sink is able to directly contact with normal-temperature outside air for elevating heat dissipation effect and prolonging service life of the car lamp.