The car lamp has a reflector (12) with a reflection surface to reflect light forward from a light source (18) plus upper wall surfaces provided on the top. A scattering disc (14) is provided on the front side of the reflector. A lamp chamber (16) is formed by the reflector and the scattering disc. An air hole (20) extends in the longitudinal direction through the reflector and serves to connect the inner space of the lamp chamber with the outer chamber.
