Provided is a binary refrigeration apparatus including: a low-temperature side refrigeration circuit including a spiral heat exchanger including a main tube and a spiral tube wound around the main tube in a spiral form, the main tube being a tube where a low-temperature side refrigerant that flows into a low-temperature side compressor enters, the spiral tube being a tube where the low-temperature side refrigerant flown out from the low-temperature side compressor enters; and a high-temperature side refrigeration circuit where a high-temperature side refrigerant that exchanges heat with the low-temperature side refrigerant through a plate heat exchanger circulates.