An air-conditioning apparatus is provided with a refrigerant cycle through which a heat-source-side refrigerant is to be circulated, a first heat medium channel to which a pump is connected and through which a heat medium such as water, an anti-freezing solution or the like is circulated, a first heat medium channel to which a pump is connected and through which a heat medium is circulated, and a plurality of use-side heat exchangers connected to the first heat medium channels. Also, the first heat medium channels are connected to the suction side of a pump through a pump flow direction switching device, and the first heat medium channels are connected to the discharge side of the pump through a pump flow direction switching device. By controlling opening degrees of the pump flow direction switching devices, the first heat medium channel which communicates with the pump is selected.