A thermoelectric refrigerator is provided with a casing formed of a heat-insulating layer, thermal conductors arranged in the casing and having a heat transfer surface located facing a storage space in the casing, a Peltier device thermally connected with the thermal conductors, a device power supply for supplying electric power to the Peltier device, an interior fan for causing interior air to flow in the storage space, a fan power supply for supplying electric power to the interior fan, and a control unit for controlling a quantity of electric power to be supplied to the interior fan in accordance with a quantity of electric power to be supplied to the Peltier device.