A refrigeration cycle device (1C; 1D; 1E) comprising: a compressor configured to compress refrigerant; a first condenser (3A, 3B) including a refrigerant flow path and a heat medium flow path, the first condenser (3A, 3B) being configured to condense the refrigerant compressed by the compressor; a second condenser including a refrigerant flow path and a heat medium flow path, the second condenser being configured to further condense the refrigerant having passed through the first condenser (3A, 3 B); an expansion valve; an evaporator configured to evaporate the refrigerant; a high/low pressure heat exchanger including a high pressure portion and a low pressure portion, the high/low pressure heat exchanger being configured to exchange heat between a high pressure refrigerant after heat exchange with a heat medium of a heat medium path and a low pressure refrigerant having passed through the evaporator; an entry heat medium temperature sensor provided in a middle of the heat medium path between an inlet and the second condenser; a second condenser bypass passage configured to bypass the refrigerant flow path in the second condenser; a flow path controlling element (5, 17) capable of varying a bypass rate that is a flow rate of the refrigerant flowing through the second condenser bypass passage; and control means, the flow path controlling element (5, 17) including the expansion valve and a bypass valve, the bypass valve being provided in a middle of the second condenser bypass passage, one end of the second condenser bypass passage being connected to a refrigerant pipe between the refrigerant flow path in the first condenser (3A, 3B) and the refrigerant flow path in the second condenser, the refrigeration cycle device (1C; 1D; 1E) being characterized in that the refrigeration cycle device (1C; 1D; 1E) further comprises the heat medium path configured to allow a liquid heat medium subjected to heat exchange with the refrigerant to pass through the second condenser and the first condenser (3A, 3B) in this order; the control means is configured to control an operation of the flow path controlling element (5, 17) so that the bypass rate becomes, when an entry heat medium temperature that is a temperature of the heat medium before heat exchange with the refrigerant is higher than a reference temperature, larger than in a case where the entry heat medium temperature is lower than the reference temperature, so as to increase a heat exchange rate in the high/low pressure heat exchanger, the other end of the second condenser bypass passage is connected to a refrigerant pipe between the expansion valve and the evaporator, and the high pressure portion in the high/low pressure heat exchanger is connected to a middle of the second condenser bypass passage. a compressor configured to compress refrigerant; a first condenser (3A, 3B) including a refrigerant flow path and a heat medium flow path, the first condenser (3A, 3B) being configured to condense the refrigerant compressed by the compressor; a second condenser including a refrigerant flow path and a heat medium flow path, the second condenser being configured to further condense the refrigerant having passed through the first condenser (3A, 3 B); an expansion valve; an evaporator configured to evaporate the refrigerant; a high/low pressure heat exchanger including a high pressure portion and a low pressure portion, the high/low pressure heat exchanger being configured to exchange heat between a high pressure refrigerant after heat exchange with a heat medium of a heat medium path and a low pressure refrigerant having passed through the evaporator; an entry heat medium temperature sensor provided in a middle of the heat medium path between an inlet and the second condenser; a second condenser bypass passage configured to bypass the refrigerant flow path in the second condenser; a flow path controlling element (5, 17) capable of varying a bypass rate that is a flow rate of the refrigerant flowing through the second condenser bypass passage; and control means, the flow path controlling element (5, 17) including the expansion valve and a bypass valve, the bypass valve being provided in a middle of the second condenser bypass passage, one end of the second condenser bypass passage being connected to a refrigerant pipe between the refrigerant flow path in the first condenser (3A, 3B) and the refrigerant flow path in the second condenser, the refrigeration cycle device (1C; 1D; 1E) being characterized in that the refrigeration cycle device (1C; 1D; 1E) further comprises the heat medium path configured to allow a liquid heat medium subjected to heat exchange with the refrigerant to pass through the second condenser and the first condenser (3A, 3B) in this order; the control means is configured to control an operation of the flow path controlling element (5, 17) so that the bypass rate becomes, when an entry heat medium temperature that is a temperature of the heat medium before heat exchange with the refrigerant is higher than a reference temperature, larger than in a case where the entry heat medium temperature is lower than the reference temperature, so as to increase a heat exchange rate in the high/low pressure heat exchanger, the other end of the second condenser bypass passage is connected to a refrigerant pipe between the expansion valve and the evaporator, and the high pressure portion in the high/low pressure heat exchanger is connected to a middle of the second condenser bypass passage.