Refrigerant cycle system

A condenser (2) of a refrigerant cycle system includes a first heat exchange unit (2a) into which refrigerant discharged from a compressor (1) flows, a second heat exchange unit (2b) disposed at a downstream of the first heat exchange unit in a refrigerant flow direction, and a gas-liquid separator (2c) disposed between the first and second heat exchange units in the refrigerant flow direction. In the refrigerant cycle system, at least gas refrigerant separated in the gas-liquid separator flows into the second heat exchange unit so that an amount of liquid refrigerant stored in the gas-liquid separator is changed in accordance with a super-heating degree of refrigerant discharged from the compressor.