To provide a vehicular lamp using a labyrinth structure for reliably preventing the entry of insects into a lamp chamber while minimizing the size of a filter.

This trunk lid lamp (vehicular lamp) 1 includes bulbs (light sources) 5, 6 and a reflector 7 stored in the lamp chamber 4 defined by a housing 2 and an outer lens 3 covering an opening thereof. Here, the opening 9 formed between the housing 2 and the reflector 7 has the labyrinth structure. The labyrinth structure is constituted of a rib 2a of the housing 7 and ribs 7a, 7b of the reflector 7.