An air-conditioning hot-water-supply device including a refrigerant circuit in which refrigerant circulates sequentially through a compressor, a hot-water-supply heat exchanger, a first expansion valve, and an outdoor heat exchanger, comprising: a four-way valve including a main body and a valve body provided inside the main body and configured to switch a refrigerant flow path in the refrigerant circuit; and wherein: a check valve provided at a first pipe (ke) connecting a low-pressure-side connection port (he) of the four-way valve and a suction side of the compressor, wherein the device is configured such that, during an operation mode, a first opening/closing section blocks between a high-pressure-side connection port of the four-way valve and a discharge side of the compressor, and the check valve allows a refrigerant flow from the four-way valve to the suction side of the compressor through the first pipe (ke) and inhibits a flow in an opposite direction, wherein a downstream side of the check valve at the first pipe (ke) and the outdoor heat exchanger are connected to each other through a second pipe (kd), and the device is further configured such that, during the operation mode, the valve body of the four-way valve is at a first position at which another end side of an indoor heat exchanger, for which a refrigerant flow is blocked on one end side during the operation mode, and the first pipe (ke) are connected to each other. a four-way valve including a main body and a valve body provided inside the main body and configured to switch a refrigerant flow path in the refrigerant circuit; and wherein: a check valve provided at a first pipe (ke) connecting a low-pressure-side connection port (he) of the four-way valve and a suction side of the compressor, wherein the device is configured such that, during an operation mode, a first opening/closing section blocks between a high-pressure-side connection port of the four-way valve and a discharge side of the compressor, and the check valve allows a refrigerant flow from the four-way valve to the suction side of the compressor through the first pipe (ke) and inhibits a flow in an opposite direction, wherein a downstream side of the check valve at the first pipe (ke) and the outdoor heat exchanger are connected to each other through a second pipe (kd), and the device is further configured such that, during the operation mode, the valve body of the four-way valve is at a first position at which another end side of an indoor heat exchanger, for which a refrigerant flow is blocked on one end side during the operation mode, and the first pipe (ke) are connected to each other. a check valve provided at a first pipe (ke) connecting a low-pressure-side connection port (he) of the four-way valve and a suction side of the compressor, wherein the device is configured such that, during an operation mode, a first opening/closing section blocks between a high-pressure-side connection port of the four-way valve and a discharge side of the compressor, and the check valve allows a refrigerant flow from the four-way valve to the suction side of the compressor through the first pipe (ke) and inhibits a flow in an opposite direction, wherein a downstream side of the check valve at the first pipe (ke) and the outdoor heat exchanger are connected to each other through a second pipe (kd), and the device is further configured such that, during the operation mode, the valve body of the four-way valve is at a first position at which another end side of an indoor heat exchanger, for which a refrigerant flow is blocked on one end side during the operation mode, and the first pipe (ke) are connected to each other.