Provided is an expiration date determination device capable of securely notifying that a predetermined period of time or the like is elapsed. The refrigerator 51 is equipped with a control unit 1. In the control unit 1, a refrigeration cycle control device 15 has a function to control a refrigeration cycle. A memory part 12 stores inspection timing information for representing a predetermined inspection timing. A time signal receiving part 11 receives a time signal including time information representing time or a time period at the time of notification from a standard frequency time station or the like and takes out time information from the time signal. A calculation control part 10 compares the time information taken out by the time signal receiving part 11 with the inspection timing information stored in the memory part 12 and determines whether an inspection timing is elapsed or not. An alarm output part 13 outputs an alarm in the case where the inspection timing is elapsed.