PROBLEM TO BE SOLVED: To provide a refrigerator that enables an oxygen concentration in a storage room to be set at a proper concentration corresponding to a storage article.SOLUTION: The refrigerator comprises: a cabinet 12 a plurality of storage rooms 31, 32, and 33 provided inside the cabinet 12 and a control device 60 that changes individually the oxygen concentration of each of the plurality of storage rooms 31, 32, and 33.