PROBLEM TO BE SOLVED: To provide a cool temperature refrigerator in which a cause of trouble can be more easily specified.SOLUTION: There are provided a cart 10, a station 30 where the cart 10 is stored. The station 30 comprises a heat exchanging chamber 31 where a heater 34 and an evaporator 33A are stored； an extendable or shrunk duct 52 communicating between the heat exchanging chamber 31 with a cool temperature refrigeration chamber 25； an operation lever 57 for changing-over a connected state and a non-connected state of the duct 52 by extending or shrinking the duct 52 in respect to the cool temperature chamber 25H； a duct detecting part 60 for detecting an extended or shrunk state of the duct 52； a cart detecting part 70 for detecting whether or not the cart 10 is stored in the station 30； a memory part 63 where the extended or shrunk state of the duct 52 and the stored state of the cart 10 are stored in correspondence with the present time counted by a time counting part 62； and a display part 81B capable of displaying the extended or shrunk state of the duct 52 and the stored state of the cart 10.SELECTED DRAWING: Figure 10
