Vehicular lamp

A vehicular lamp having a ventilation system, comprising

• a lamp body having a front opening;
• a lens mounted onto said front opening of said lamp body;
• a lamp chamber defined by said lamp body and said lens;
• and
• a ventilation system comprising:
• a communication hole formed in said lamp body;
• a first peripheral wall projecting from a rear surface of said lamp body at a position where said first peripheral wall surrounds said communication hole;
• an upper and lower water preventive walls projecting from said first peripheral wall downwardly of said communication hole;
• a second peripheral wall surrounding said first peripheral wall, said second peripheral wall projecting from the rear surface of said lamp body;
• a lid member engaging with said second peripheral wall for covering said first and second peripheral walls;
• a first space defined between said lamp body, said lid member and said first peripheral wall, said first space communicating through said communication hole with said lamp chamber;
• a second space defined between said lamp body, said lid member and said upper and lower water preventive walls, said second space communicating with said first space through a first communication passage formed at a first position in the lateral direction;
• and
• a third space defined between said lamp body, said lid member, said lower water preventive wall and said second peripheral wall, said third space communicating with said second space through a second communication passage formed at a second position opposite to said first position, said third space communicating with atmosphere.