A refrigeration apparatus (100, 100a) that performs a refrigeration cycle in a refrigerant circuit (RC, RC1), comprising: a heat source unit (10, 10') including a compressor for refrigerant and a heat-source-side heat exchanger; a plurality of utilization units each of which is connected in parallel to the heat source unit and includes a utilization-side heat exchanger; a refrigerant-flow-path switching unit (40, 40') that includes a plurality of first gas-side control valves each of which switches a flow of refrigerant in a corresponding one of the utilization units and that individually switches a flow of refrigerant in each of the utilization units; a first gas-side connection pipe that is disposed between the heat source unit and each of the first gas-side control valves and through which high-pressure gas refrigerant flows; a plurality of first gas-side branch pipes each of which is included in the first gas-side connection pipe and communicates with a corresponding one of the utilization units; and a blocking valve that is disposed in the first gas-side connection pipe and blocks a flow of refrigerant when in a closed state, wherein each of the first gas-side control valves is disposed in the first gas-side branch pipe that communicates with a corresponding one of the utilization units, the first gas-side connection pipe includes a plurality of branch portions connected to the first gas-side branch pipes, and the blocking valve is disposed between the heat source unit and each of the branch portions, characterized in that each of the first gas-side control valves is configured to allow a small amount of refrigerant to pass therethrough when in a closed state, wherein each of the first gas-side control valves is configured to be in a slightly opened state at a minimum opening degree when in a closed state allowing a small amount of refrigerant to pass therethrough for the purpose of collecting refrigeration oil to the compressor. a heat source unit (10, 10') including a compressor for refrigerant and a heat-source-side heat exchanger; a plurality of utilization units each of which is connected in parallel to the heat source unit and includes a utilization-side heat exchanger; a refrigerant-flow-path switching unit (40, 40') that includes a plurality of first gas-side control valves each of which switches a flow of refrigerant in a corresponding one of the utilization units and that individually switches a flow of refrigerant in each of the utilization units; a first gas-side connection pipe that is disposed between the heat source unit and each of the first gas-side control valves and through which high-pressure gas refrigerant flows; a plurality of first gas-side branch pipes each of which is included in the first gas-side connection pipe and communicates with a corresponding one of the utilization units; and a blocking valve that is disposed in the first gas-side connection pipe and blocks a flow of refrigerant when in a closed state, wherein each of the first gas-side control valves is disposed in the first gas-side branch pipe that communicates with a corresponding one of the utilization units, the first gas-side connection pipe includes a plurality of branch portions connected to the first gas-side branch pipes, and the blocking valve is disposed between the heat source unit and each of the branch portions, characterized in that