A refrigerator includes an inner case configured to accommodate a refrigerated item therein, an outer case configured to surround the inner case, a heat insulator configured to be at least partially disposed between the inner case and the outer case, and a reinforcing member disposed between the inner case and the outer case to support the outer case and having a fastening part to couple the refrigerator with another refrigerator installed adjacent to the refrigerator by using a connection member, and the fastening part coupled to the connection member to enable alignment between the refrigerator and the another refrigerator.