Abstract: There is disclosed a showcase cooling device which is capable of cooling all of a plurality of showcases with no difficulty, while suppressing a power consumption of a compressor. A showcase cooling device 1 distributes and supplies a refrigerant discharged from a compressor to evaporators disposed in a plurality of showcases 3A to 3H, and comprises chamber inside temperature sensors which detect chamber inside temperatures of the showcases 3A to 3H, respectively, and control means for controlling an operation of the compressor, and this control means controls the operation of the compressor on the basis of the chamber inside temperature of the showcase that is hardest to cool among the respective showcases 3A to 3H.