An air-conditioning apparatus comprising: a plurality of heat source units each including a compressor, a heat source-side heat exchanger, and an accumulator; a use-side unit including a use-side heat exchanger and a pressure reducing device; a bypass pipe provided in each of the plurality of heat source units and branched from a pipe between the heat source-side heat exchanger and the pressure reducing device to form a bypass to a suction side of the compressor; a flow control valve provided in the bypass pipe; a high-low pressure heat exchanger exchanging heat between low-pressure refrigerant and high-pressure refrigerant, the low-pressure refrigerant flowing through the bypass pipe between the flow control valve and the suction side of the compressor, the high-pressure refrigerant flowing between the heat source-side heat exchanger and the pressure reducing device; and a controller configured to decide whether liquid refrigerant is unevenly distributed among the plurality of heat source units, characterized in that, when the controller decides that the liquid refrigerant is unevenly distributed among the plurality of heat source units, the controller being configured to adjust an outlet subcooling degree of the heat source-side heat exchanger or an outlet subcooling degree at a high-pressure outlet of the high-low pressure heat exchanger, and a discharge superheating degree of the compressor in a low capacity-side heat source unit to match low heat exchange capacity of the heat source-side heat exchanger in the low capacity-side heat source unit with high heat exchange capacity of the heat source-side heat exchanger in a high capacity-side heat source unit, the low capacity-side heat source unit being one of the plurality of heat source units in which the heat source-side heat exchanger has the low heat exchange capacity, the high capacity-side heat source unit being an other of the plurality of heat source units in which the heat source-side heat exchanger has the high heat exchange capacity, the controller being configured to adjust an opening degree of the flow control valve of the high capacity-side heat source unit on a basis of an outlet superheating degree of the bypass pipe of the high capacity-side heat source unit, in a case where the heat exchange capacity of the heat source-side heat exchanger of the low capacity-side heat source unit is at an upper limit of a capacity range when the controller decides that the liquid refrigerant is unevenly distributed among the plurality of heat source units. a plurality of heat source units each including a compressor, a heat source-side heat exchanger, and an accumulator; a use-side unit including a use-side heat exchanger and a pressure reducing device; a bypass pipe provided in each of the plurality of heat source units and branched from a pipe between the heat source-side heat exchanger and the pressure reducing device to form a bypass to a suction side of the compressor; a flow control valve provided in the bypass pipe; a high-low pressure heat exchanger exchanging heat between low-pressure refrigerant and high-pressure refrigerant, the low-pressure refrigerant flowing through the bypass pipe between the flow control valve and the suction side of the compressor, the high-pressure refrigerant flowing between the heat source-side heat exchanger and the pressure reducing device; and a controller configured to decide whether liquid refrigerant is unevenly distributed among the plurality of heat source units, characterized in that, when the controller decides that the liquid refrigerant is unevenly distributed among the plurality of heat source units, the controller being configured to adjust an outlet subcooling degree of the heat source-side heat exchanger or an outlet subcooling degree at a high-pressure outlet of the high-low pressure heat exchanger, and a discharge superheating degree of the compressor in a low capacity-side heat source unit to match low heat exchange capacity of the heat source-side heat exchanger in the low capacity-side heat source unit with high heat exchange capacity of the heat source-side heat exchanger in a high capacity-side heat source unit, the low capacity-side heat source unit being one of the plurality of heat source units in which the heat source-side heat exchanger has the low heat exchange capacity, the high capacity-side heat source unit being an other of the plurality of heat source units in which the heat source-side heat exchanger has the high heat exchange capacity, the controller being configured to adjust an opening degree of the flow control valve of the high capacity-side heat source unit on a basis of an outlet superheating degree of the bypass pipe of the high capacity-side heat source unit, in a case where the heat exchange capacity of the heat source-side heat exchanger of the low capacity-side heat source unit is at an upper limit of a capacity range when the controller decides that the liquid refrigerant is unevenly distributed among the plurality of heat source units.