To prevent dew condensation at a power supply device in a freezer including a cooler which cools the power supply device for driving a motor for a compressor by using a refrigerant.

A freezer (1) includes: a compressor (2); a condenser (3); an expansion valve (4); an evaporator (5); and a cooler (19) which cools the power supply device for supplying electric power to a motor (2b) for driving the compressor (2) by using the refrigerant flowing out from the condenser (3). A controller (7) increases a temperature of the refrigerant flowing at an outlet of the condenser (3) when a temperature range in which dew condensation may occur in the power supply device (P) is detected.