A refrigerating apparatus includes a casing body attached to an opening formed at one end of a box-shaped cooling compartment so as to close the opening, a refrigeration cycle unit including a compressor and a radiator provided on an outer side of the cooling compartment relative to the casing body and an evaporator provided on an inner side of the cooling compartment relative to the casing body, a diagnosis process executer configured to control the refrigeration cycle unit to execute a diagnosis process for diagnosing a performance of the cooling compartment, and a performance determinator configured to determine the performance of the cooling compartment in the diagnosis process.