Cold storage (1) comprises a housing (2) that has a storage space (S) for an item to be kept cold therein, and a heat exchanger tube (3) that is provided in the storage space (S). The heat exchanger tube (3) is a multilayer pipe comprising a thermally conductive outer pipe, the outer face of which faces the storage space (S), and an inner pipe provided on the inside of the outer pipe. A first brine solution that does not freeze at 0°C is accommodated between the outer pipe and the inner pipe. A refrigerant or a second brine solution that does not freeze at 0°C is accommodated in the inner pipe.
