An air-conditioning apparatus comprising: a refrigerant circuit having first through n-th heat source units (101a, 101b, 101c) having first through n-th heat source-side heat exchangers (104a, 104b, 104c) which function at least as condensers and first through n-th heat source-side flow rate adjustment means (103a, 103b, 103c) configured to adjust the flow rate of refrigerant flowing through the first through n-th heat source-side heat exchangers (104a, 104b, 104c), wherein the first through n-th heat source-side flow rate adjustment means (103a, 103b, 103c) are first through n-th heat source-side flow rate adjustment valves (103a, 103b, 103c); first through n-th determination units (162a, 162b, 162c) configured to determine first through n-th degrees of subcooling in the outlet sides of the first through n-th heat source-side heat exchangers (104a, 104b, 104c); and a controller (164a, 164b, 164c) configured to control the first through n-th heat source-side flow rate adjustment valves (103a, 103b, 103c), characterised in that the first through n-th heat source-side flow rate adjustment valves (103a, 103 b, 103c) are so controlled that the first through n-th degrees of subcooling come to be equal when refrigerant is charged into the refrigerant circuit, wherein the controller (164a, 164b, 164c) is configured to set the first heat source-side flow rate adjustment valve to a first opening degree and sets the opening degrees of the second through n-th heat source-side flow rate adjustment valves (103b, 103c) to opening degrees having smaller openings than the first opening degree when the first degree of subcooling is greater than any of the second through n-th degrees of subcooling. a refrigerant circuit having first through n-th heat source units (101a, 101b, 101c) having first through n-th heat source-side heat exchangers (104a, 104b, 104c) which function at least as condensers and first through n-th heat source-side flow rate adjustment means (103a, 103b, 103c) configured to adjust the flow rate of refrigerant flowing through the first through n-th heat source-side heat exchangers (104a, 104b, 104c), wherein the first through n-th heat source-side flow rate adjustment means (103a, 103b, 103c) are first through n-th heat source-side flow rate adjustment valves (103a, 103b, 103c); first through n-th determination units (162a, 162b, 162c) configured to determine first through n-th degrees of subcooling in the outlet sides of the first through n-th heat source-side heat exchangers (104a, 104b, 104c); and a controller (164a, 164b, 164c) configured to control the first through n-th heat source-side flow rate adjustment valves (103a, 103b, 103c), characterised in that the first through n-th heat source-side flow rate adjustment valves (103a, 103 b, 103c) are so controlled that the first through n-th degrees of subcooling come to be equal when refrigerant is charged into the refrigerant circuit, wherein the controller (164a, 164b, 164c) is configured to set the first heat source-side flow rate adjustment valve to a first opening degree and sets the opening degrees of the second through n-th heat source-side flow rate adjustment valves (103b, 103c) to opening degrees having smaller openings than the first opening degree when the first degree of subcooling is greater than any of the second through n-th degrees of subcooling.