PURPOSE: To effectively cool a cage room setting up in an air straightening cover a room cooling device without deteriorating its heat exchange efficiency by providing in the room cooling device a condenser arranging its exhaust suction port in a level equal to an external surface of the air straightening cover.

CONSTITUTION: Hot air, after it exchanges heat with a refrigerant in a condenser 8, is blown out directly to the outside of air straightening covers 3, 4 from a blow port 11. In this way, the hot air is blown not staying in the inside of the air flow straightening covers 3, 4, consequently a cage room 1 is prevented from heating its inside through a cage roof 1b and a cage floor 1a, while a peripheral temperature can be suppressed from increasing in a part providing the condenser 8 of outdoor unit 6 or the like of a room cooling device.