The utility model relates to a vehicle -mounted lamp especially relates to the light that can enough produce the luminance abundance and can reduce again to the required constitution or the vehicle -mounted lamp of cost of dispelling the heat. Vehicle -mounted lamp includes: a lamp unit, the 2nd lamp unit to the optical axis lies in the different orientation each other with a lamp unit for the benchmark, the partly of the light that produces from first lamps and lanterns and the 2nd lamp unit is blocked to the separation unit, lens unit is located the place ahead of separation unit, and heat dissipation unit for install a lamp unit and the 2nd lamp unit, a lamp unit and the 2nd lamp unit include respectively: light source portion, including a plurality of light sources, a plurality of light sources include at least one light emitting component, and the reflecting part, including a plurality of reflectors, a plurality of reflectors are used for reflecting the light that produces from aplurality of light sources to the place ahead, and the horizontal size of a lamp unit's reflecting part is greater than the horizontal size of the 2nd lamp unit's reflecting part.