Disclosed is a refrigerator includes a storage room and having a cool air off mode in which supply of cool air to the storage room is cut off. Thus, a refrigerator having a cooling system in which a pair of evaporators are serially connected for a pair of storage rooms is provided according to the above embodiments. A refrigerator may also have a cooling system in which a plurality of evaporators is connected in parallel and refrigerant is selectively supplied to each evaporator by a refrigerant supply valve.