To securely achieve starting by preventing a liquid refrigerant from flowing into a condensation section of a refrigerant heat exchanger from a receiver upon interruption.

A binary freezing apparatus is constructed by connecting a high temperature side freezing circuit and a low temperature side freezing circuit through a refrigerant heat exchanger 11 that is a cascade capacitor. The high temperature side freezing circuit and the low temperature side freezing circuit are adapted such that a refrigerant is circulated in both circuits and a vapor compression type freezing cycle operation is achieved. In the low temperature side freezing circuit a receiver 34 and a condensation section of the refrigerant heat exchanger 11 are connected through piping. The receiver 34 is constructed with a substantially cylindrical pressure container and is disposed at a fallen state. The refrigerant heat exchanger 11 is mounted on the receiver 34 through a stay section 37.