To provide a small refrigerating device for a fishing vessel having a simple structure by supporting a cover means via a horizontal mechanism, keeping a refrigerator at the horizontal state even when a hull is rolled, and arranging a reciprocative pipe and an electric wiring cable between the refrigerator and an evaporator.

A refrigerator A is suspended from a support frame 7 erected on a cover 2 through a wire 5 and a chain 6 in a horizontal mechanism keeping the refrigerator A and an evaporator horizontal. A reciprocative pipe 8 passing through a connecting pipe C feeds a refrigerant from the refrigerator A side to the evaporator B side and returns the refrigerant from the evaporator B side to the refrigerator A side. An electric wiring cable 9 feeds power to the drive motor of a blast fan on the evaporator B side and sends the detection signal from a sensor. A compressor can be air-cooled without causing the possibility that a seisure occurs due to defective lubrication or defective cooling, and this refrigerating device can be fitted to a small fishing vessel at a low cost.