PURPOSE: To bring temperatures in a container frozen by a thermoelectric device and a container for receiving heat produced from the thermoelectric device to those of the freezing point or lower by providing the thermoelectric device for cooling the container for receiving heat.

CONSTITUTION: A freezing container 1 includes an outer wall 2 comprising a heat insulating material and an inner wall 3 comprising aluminum provided to effectively and uniformly cool the inside of the freezing container 1. A thermoelectric device 4 is mounted in the freezing container 1, and the heat radiation surface side of the thermoelectric device 4 is accomodated in a heat insulating material container 6. The thermoelectric device 9 is actuated to cool the inside of the container 6, and heat robbed by the thermoelectric device 4 from the freezing container 1 is dissipated to the thermoelectric device 9 through air in the container 6. At this time, input power to the thermoelectric devices 4 and 9 is adjusted. Hereby, provided temperature in the container 6 is set to 15°C when fresh air temperature is 30°C, the temperature in the freezing container 1 can be brought to -10°C.