An air-conditioning apparatus (100, 300) comprising: - control means (50, 51, 52c-52e), - a heat source unit including a compressor, - a first flow passage switching valve that switches a flow passage of a first refrigerant, and a heat-source-side heat exchanger; - a plurality of indoor units (C, D, E) each including a use-side heat exchanger; and - a relay unit including a plurality of intermediate heat exchangers (9a, 9b), second flow passage switching valves that switch operation of the indoor units (C, D, E) between heating and cooling, and third flow passage switching valves that switch connection of the intermediate heat exchangers (9a, 9b) between a condenser and an evaporator, the air-conditioning apparatus (100, 300) in which - a primary-side cycle is formed through which a primary-side heat transfer medium circulates between the heat source unit and the relay unit, - a secondary-side cycle is formed through which a secondary-side heat transfer medium circulates between the relay unit and the indoor units (C, D, E), and - heat exchange is performed between the primary-side cycle and the secondary-side cycle in the intermediate heat exchangers (9a, 9b), wherein when all of the operating indoor units out of the plurality of indoor units (C, D, E) are performing a cooling operation, the control means are adapted to control: - the third flow passage switching valves such that the number of the intermediate heat exchangers (9a, 9b) operating as evaporators is greater than in a cooling main operation in which the indoor unit (C, D, E) performing cooling and the indoor unit (C, D, E) performing heating exist at the same time and the first flow passage switching valve is controlled so that the heat-source-side heat exchanger operates by being connected to a discharge side of the compressor, and characterized in that during the cooling main operation, the control means are adapted to set: - a target value for a suction pressure or an evaporating temperature at the compressor to be equal to or lower than a case where all of the operating indoor units (C, D, E) are performing the cooling operation, and to set a frequency of the compressor and a capacity of the heat-source-side heat exchanger so that they reach the target value. - control means (50, 51, 52c-52e), - a heat source unit including a compressor, - a first flow passage switching valve that switches a flow passage of a first refrigerant, and a heat-source-side heat exchanger; - a plurality of indoor units (C, D, E) each including a use-side heat exchanger; and - a relay unit including a plurality of intermediate heat exchangers (9a, 9b), second flow passage switching valves that switch operation of the indoor units (C, D, E) between heating and cooling, and third flow passage switching valves that switch connection of the intermediate heat exchangers (9a, 9b) between a condenser and an evaporator, - a primary-side cycle is formed through which a primary-side heat transfer medium circulates between the heat source unit and the relay unit, - a secondary-side cycle is formed through which a secondary-side heat transfer medium circulates between the relay unit and the indoor units (C, D, E), and - heat exchange is performed between the primary-side cycle and the secondary-side cycle in the intermediate heat exchangers (9a, 9b), - the third flow passage switching valves such that the number of the intermediate heat exchangers (9a, 9b) operating as evaporators is greater than in a cooling main operation in which the indoor unit (C, D, E) performing cooling and the indoor unit (C, D, E) performing heating exist at the same time and the first flow passage switching valve is controlled so that the heat-source-side heat exchanger operates by being connected to a discharge side of the compressor, and - a target value for a suction pressure or an evaporating temperature at the compressor to be equal to or lower than a case where all of the operating indoor units (C, D, E) are performing the cooling operation, and to set a frequency of the compressor and a capacity of the heat-source-side heat exchanger so that they reach the target value.