Refrigerator equipped with apparatus for producing carbonated water

A refrigerator includes a body, a storage chamber, a door, a water tank to store clean water, a carbonated water production module mounted to a back surface of the door while including a carbon dioxide gas cylinder stored with carbon dioxide gas, and a carbonated water tank to produce carbonated water through mixing of the clean water with the carbon dioxide gas, a dispenser including a dispensation space formed at the door, a carbonated discharge line to connect the carbonated water tank and the dispensation space, so as to retrieve the carbonated water in the dispensation space, and a clean water discharge line to connect the water tank and the dispensation space without passing through the carbonated water tank, so as to retrieve the clean water in the dispensation space, and a carbonated water regulator to maintain a discharge pressure of the carbonated water at a predetermined pressure.