A refrigerating apparatus comprising: a first refrigeration cycle circuit (91, 191) including a first compressor (1, 101), a first radiator, a supercooler, a first pressure-reducing device and an evaporator that are successively connected to one another through a refrigerant pipe; a second refrigeration cycle circuit (92, 192) including a second compressor (31, 131), a second radiator, a second pressure-reducing device and the supercooler that are successively connected to one another through a refrigerant pipe, refrigerant of the first refrigeration cycle circuit (91, 191) being super-cooled by vaporization action of the second refrigeration cycle circuit (92 192) in the supercooler, and hot-water supply water being warmed by heat radiation action of refrigerant of the second refrigeration cycle circuit (92, 192) in the second radiator; a refrigeration unit in which the first compressor (1, 101) and the first radiator are mounted; a showcase in which the first pressure-reducing device and the evaporator are mounted; a supercooling hot water supply device in which the second compressor (31, 131), the second radiator, the second pressure-reducing device and the supercooler are mounted; and a hot-water stock device having a hot water supply tank that is connected to the second radiator of the supercooling hot water supply device through the second radiator, the refrigerating apparatus further comprising: a subsidiary refrigerant circuit that branches a part of refrigerant flowing out from the first radiator and sucks the branched refrigerant into some midpoint of a compression process of the first compressor (1, 101); a subsidiary throttle unit that is provided on the subsidiary refrigerant circuit and reduces the branched refrigerant to an intermediate pressure that is higher than the suction pressure of the compressor (1, 101) and lower than a discharge pressure of the compressor (1, 101); and a subsidiary heat exchanger for performing heat-exchange between the branched refrigerant that is reduced in pressure by the subsidiary throttle unit and the refrigerant that is cooled by the first radiator and flows into the super-cooler. a first refrigeration cycle circuit (91, 191) including a first compressor (1, 101), a first radiator, a supercooler, a first pressure-reducing device and an evaporator that are successively connected to one another through a refrigerant pipe; a second refrigeration cycle circuit (92, 192) including a second compressor (31, 131), a second radiator, a second pressure-reducing device and the supercooler that are successively connected to one another through a refrigerant pipe, refrigerant of the first refrigeration cycle circuit (91, 191) being super-cooled by vaporization action of the second refrigeration cycle circuit (92 192) in the supercooler, and hot-water supply water being warmed by heat radiation action of refrigerant of the second refrigeration cycle circuit (92, 192) in the second radiator; a refrigeration unit in which the first compressor (1, 101) and the first radiator are mounted; a showcase in which the first pressure-reducing device and the evaporator are mounted; a supercooling hot water supply device in which the second compressor (31, 131), the second radiator, the second pressure-reducing device and the supercooler are mounted; and a hot-water stock device having a hot water supply tank that is connected to the second radiator of the supercooling hot water supply device through the second radiator, the refrigerating apparatus further comprising: a subsidiary refrigerant circuit that branches a part of refrigerant flowing out from the first radiator and sucks the branched refrigerant into some midpoint of a compression process of the first compressor (1, 101); a subsidiary throttle unit that is provided on the subsidiary refrigerant circuit and reduces the branched refrigerant to an intermediate pressure that is higher than the suction pressure of the compressor (1, 101) and lower than a discharge pressure of the compressor (1, 101); and a subsidiary heat exchanger for performing heat-exchange between the branched refrigerant that is reduced in pressure by the subsidiary throttle unit and the refrigerant that is cooled by the first radiator and flows into the super-cooler. a subsidiary refrigerant circuit that branches a part of refrigerant flowing out from the first radiator and sucks the branched refrigerant into some midpoint of a compression process of the first compressor (1, 101); a subsidiary throttle unit that is provided on the subsidiary refrigerant circuit and reduces the branched refrigerant to an intermediate pressure that is higher than the suction pressure of the compressor (1, 101) and lower than a discharge pressure of the compressor (1, 101); and a subsidiary heat exchanger for performing heat-exchange between the branched refrigerant that is reduced in pressure by the subsidiary throttle unit and the refrigerant that is cooled by the first radiator and flows into the super-cooler.