A refrigerator that has a refrigerant circuit in which a plurality of compressors, a plurality of condensers, a liquid container, a plurality of supercooling heat exchange portions, a throttle valve, and an evaporator are connected in this order by piping; a plurality of return circuits, wherein a return circuit branches from a downstream position in a refrigerant flowing direction of one of said plurality of supercooling heat exchange portions in said refrigerant circuit and leads to an intermediate-pressure chamber of one of said plurality of compressors via one of said plurality of supercooling heat exchange portions; a plurality of supercooling throttle valves with a variable valve opening-degree that are disposed on refrigerant inlet sides of said plurality of supercooling heat exchange portions in said plurality of return circuits; and operation state detecting means that is adapted to detect operation state data in said refrigerant circuit, comprising: dryness-degree calculating means that is configured to calculate a dryness-degree of the refrigerant on the outlet sides of said plurality of supercooling heat exchange portions in said plurality of return circuits on the basis of the operation state data detected by said operation state detecting means; and supercooling throttle valve control means that is configured to control the valve opening-degree of said plurality of supercooling throttle valves so that the dryness-degree calculated by said dryness-degree calculating means gets close to a predetermined value of 1; wherein the refrigerator comprises: a plurality of common compressor-side modules in each of which one of the plurality of the compressors and one of the plurality of the condensers are disposed; a liquid-collection-side module in which said liquid container to which each of said plurality of compressor-side modules is connected and which contains a liquid refrigerant from said plurality of condensers of said plurality of compressor-side modules is disposed; a plurality of parallel pipelines in which the liquid refrigerant from said liquid container is distributed in parallel into the number corresponding to said compressor-side modules; a common set composed of one of said plurality of return circuits, one of said plurality of supercooling heat exchange portions, and one of said plurality of supercooling throttle valves disposed in each of said parallel pipelines; said throttle valve that is adapted to throttle the refrigerant merged from said plurality of parallel pipelines; and said evaporator that is adapted to evaporate the refrigerant from said throttle valve, connected in this order by piping so as to constitute a refrigerant circuit. dryness-degree calculating means that is configured to calculate a dryness-degree of the refrigerant on the outlet sides of said plurality of supercooling heat exchange portions in said plurality of return circuits on the basis of the operation state data detected by said operation state detecting means; and supercooling throttle valve control means that is configured to control the valve opening-degree of said plurality of supercooling throttle valves so that the dryness-degree calculated by said dryness-degree calculating means gets close to a predetermined value of 1; a plurality of common compressor-side modules in each of which one of the plurality of the compressors and one of the plurality of the condensers are disposed; a liquid-collection-side module in which said liquid container to which each of said plurality of compressor-side modules is connected and which contains a liquid refrigerant from said plurality of condensers of said plurality of compressor-side modules is disposed; a plurality of parallel pipelines in which the liquid refrigerant from said liquid container is distributed in parallel into the number corresponding to said compressor-side modules; a common set composed of one of said plurality of return circuits, one of said plurality of supercooling heat exchange portions, and one of said plurality of supercooling throttle valves disposed in each of said parallel pipelines; said throttle valve that is adapted to throttle the refrigerant merged from said plurality of parallel pipelines; and said evaporator that is adapted to evaporate the refrigerant from said throttle valve, connected in this order by piping so as to constitute a refrigerant circuit.