To provide a small-sized and lightweight coffin cooling device capable of cooling the inside of a coffin at a low running cost.

A casing 3 is provided with a Stirling refrigerator 9 wherein a heat absorbing heat sink 12 as a heat exchanger is connected to the adjacency of a heat absorber part 9A to transfer the heat, and an air blower 17 sucking an air flow from an inlet 6 and blowing the air flow from an outlet 7; and a cooling unit 2 constituted to cool the air flow by the air blower 17 by the heat absorbing heat sink 12 is so attached as to connect the inlet 6 and the outlet to the coffin C. This constitution can cool the space in the coffin C and the body stored in the coffin C and the relatively small-sized and low power consumption Stirling refrigerator 9 is used to make this coffin cooling device 1 small-size, lightweight and low power consumption.