A refrigerator includes a main body having a refrigerating compartment and a freezing compartment, a door for opening or closing the refrigerating compartment or the freezing compartment, a filter unit disposed within the refrigerating compartment for purifying water supplied from a water supply source outside the main body, water tank for receiving the purified water from the filter unit and to cool the received water by using cool air within the refrigerating compartment, and a dispenser disposed in the door to dispense the cooled water stored in the tube tank assembly. The tube tank assembly includes a tube defining a cold water passage that can allow the cooled water to flow therethrough, and a tube support around which the tube is wound multiple times.