A refrigeration apparatus comprising: a first cooling section disposed such that a first compressor , a first condenser , a first expander , and a first evaporator achieve fluid communication with one another in a first fluid circuit through which a first refrigerant circulates; a second cooling section disposed such that a second compressor , a second condenser that constitutes a cascade condenser in cooperation with the first evaporator , a second expander , and a second evaporator achieve fluid communication with one another in a second fluid circuit through which a second refrigerant circulates; a storage section that includes a storage space (S) for a cooling target cooled by the second evaporator ; an internal temperature sensor (Se1) that detects a temperature of the storage space (S); a control section that determines a second rotation speed of the second compressor based on a target temperature of the storage space (S) and a detection result obtained by the internal temperature sensor (Se1), and determines a first rotation speed of the first compressor ; and a first power supply section and a second power supply section that supply power to the first compressor and the second compressor , respectively, based on the first rotation speed and the second rotation speed determined by the control section , respectively, characterized in that the control section is configured to determine the first rotation speed of the first compressor based on the determined second rotation speed of the second compressor , and the first rotation speed has a predetermined correspondence relation with the second rotation speed. a first cooling section disposed such that a first compressor , a first condenser , a first expander , and a first evaporator achieve fluid communication with one another in a first fluid circuit through which a first refrigerant circulates; a second cooling section disposed such that a second compressor , a second condenser that constitutes a cascade condenser in cooperation with the first evaporator , a second expander , and a second evaporator achieve fluid communication with one another in a second fluid circuit through which a second refrigerant circulates; a storage section that includes a storage space (S) for a cooling target cooled by the second evaporator ; an internal temperature sensor (Se1) that detects a temperature of the storage space (S); a control section that determines a second rotation speed of the second compressor based on a target temperature of the storage space (S) and a detection result obtained by the internal temperature sensor (Se1), and determines a first rotation speed of the first compressor ; and a first power supply section and a second power supply section that supply power to the first compressor and the second compressor , respectively, based on the first rotation speed and the second rotation speed determined by the control section , respectively, characterized in that the control section is configured to determine the first rotation speed of the first compressor based on the determined second rotation speed of the second compressor , and the first rotation speed has a predetermined correspondence relation with the second rotation speed. <EOS>