To provide a cooling unit capable of effectively carrying out supercooling of a refrigerant flowing in an inlet pipe connected to an inlet of an evaporator through an expansion valve, and remarkably reducing worker's burden when installed.

In a cooling coil 10 arranging an evaporator 16 in one side of a surface of a drain pan 11, and arranging a blower 18 generating an air flow passing the evaporator 16 in another side of the surface of the drain pan 11, an inlet pipe 12 connected to an inlet of the evaporator 16 is arranged to meander so as to contact with the back side of the drain pan 11.