Disclosed herein is a container refrigeration apparatus including an exterior fan and a gas supply device. The gas supply device includes a unit case having a cooling air inlet port and a cooling air outlet port, and a pump mechanism housed in the unit case and configured to suck, and compress, outside air. The container refrigeration apparatus has an exhaust passage through which the unit case and a space on a suction side of the exterior fan are connected together such that the exterior fan sucks air through the cooling air outlet port out of the unit case. As a result, the problem of heat generated by the gas supply device including the pump mechanism may be solved at low cost.
