To provide an equipment cooling system normally operated by cooling equipment mounted on a vehicle while having conventional self-cooling capability, and a rail vehicle provided with the system.

In a cabin of a vehicle body 1 of a rail vehicle, various kinds of in-vehicle mounting equipment 3 and in-vehicle mounting equipment 4 are mounted in an equipment body 12. An-air conditioning duct 10 of a ceiling fed out by air-conditioning air from an air conditioner 5 is extended to the equipment body 12 through a cooling air take-in duct (ceiling) 11. By feeding cooling air generated by the air conditioner 5 into the equipment body 12, an atmosphere temperature of the equipment body 12 is prevented from being raised to perform the cooling of the equipment 3 and the equipment 4.