A refrigerator comprising: a cabinet forming a storage space; a door configured to open and close the storage space; a dispenser provided at the door for dispensing water out of the refrigerator and comprising a water take-out valve; and a water tank for storing water and provided in the storage space above the dispenser and including a drain port for discharging the water stored therein; wherein the water take-out valve comprising: a pipe part communicating with the drain port of the water tank to receive the water discharged from the drain port and including an inner surface defining a flow passage for the water so received; and a valve body disposed inside the flow passage of the pipe part and slidingly movable back and forth inside the flow passage of the pipe part along a longitudinal direction of the pipe part to open and close an opening and closing surface of the pipe part for allowing and blocking dispensing of water from the dispenser; an opening/closing ring fitted around the valve body facing the inner surface of the flow passage of the pipe part and configured to contact the inner surface of the flow passage of the pipe part to close the opening and closing surface; wherein the valve body includes an extension part extending from a surface of the valve body toward the inner surface of the pipe part; and wherein the water take-out valve comprises a leak prevention ring provided around the extension part and configured to contact the inner surface of the pipe part to seal a gap between the inner surface of the pipe part and the valve body, in a state when the opening and closing surface is closed by the valve body. a cabinet forming a storage space; a door configured to open and close the storage space; a dispenser provided at the door for dispensing water out of the refrigerator and comprising a water take-out valve; and a water tank for storing water and provided in the storage space above the dispenser and including a drain port for discharging the water stored therein; wherein the water take-out valve comprising: a pipe part communicating with the drain port of the water tank to receive the water discharged from the drain port and including an inner surface defining a flow passage for the water so received; and a valve body disposed inside the flow passage of the pipe part and slidingly movable back and forth inside the flow passage of the pipe part along a longitudinal direction of the pipe part to open and close an opening and closing surface of the pipe part for allowing and blocking dispensing of water from the dispenser; an opening/closing ring fitted around the valve body facing the inner surface of the flow passage of the pipe part and configured to contact the inner surface of the flow passage of the pipe part to close the opening and closing surface; a pipe part communicating with the drain port of the water tank to receive the water discharged from the drain port and including an inner surface defining a flow passage for the water so received; and a valve body disposed inside the flow passage of the pipe part and slidingly movable back and forth inside the flow passage of the pipe part along a longitudinal direction of the pipe part to open and close an opening and closing surface of the pipe part for allowing and blocking dispensing of water from the dispenser; an opening/closing ring fitted around the valve body facing the inner surface of the flow passage of the pipe part and configured to contact the inner surface of the flow passage of the pipe part to close the opening and closing surface; wherein the valve body includes an extension part extending from a surface of the valve body toward the inner surface of the pipe part; and wherein the water take-out valve comprises a leak prevention ring provided around the extension part and configured to contact the inner surface of the pipe part to seal a gap between the inner surface of the pipe part and the valve body, in a state when the opening and closing surface is closed by the valve body.