A refrigerator comprising: a cabinet having therein: a refrigerator compartment; and a freezer compartment positioned below the refrigerator compartment; a pair of refrigerator compartment doors, affixed to the cabinet, respectively at left and right side of the refrigerator compartment, for opening and closing the refrigerator compartment, wherein an ice maker and a dispenser are provided at one of the pair of refrigerator compartment doors; a main water tank, provided within the refrigerator compartment, being configured to cool water supplied from outside; a water purifying device, provided at the cabinet, being configured to purify water; a sub-water tank provided at said one of the pair of refrigerator compartment doors, being configured to cool the water from the main water tank; and a water supply path through which the water purifying device, the main water tank, the sub-water tank, the dispenser and the ice maker are in fluid connection, wherein the water supply path includes: a first branch valve, positioned at the cabinet side, being connected to an outlet side of the water purifying device and the main water tank to selectively supply the purified water or the cooled water toward the side of said one of the refrigerator compartment doors; a second branch valve, provided at said one of the refrigerator compartment doors, being connected to an inlet side of the dispenser and the ice maker to selectively supply the water coming through the first branch valve to the dispenser or the ice maker; and a discharging valve disposed at one of the pair of refrigerator compartment doors and configured to open and close the water supply path to supply the cooled water to the dispenser, wherein the refrigerator further comprises a hinge configured to rotatably connect said one of the pair of the refrigerator compartment doors with the cabinet, wherein a part of the water supply path connected to an outlet side of the first branch valve and extending into said one of the refrigerator compartment doors consists of a single passage passing through the hinge. a pair of refrigerator compartment doors, affixed to the cabinet, respectively at left and right side of the refrigerator compartment, for opening and closing the refrigerator compartment, wherein an ice maker and a dispenser are provided at one of the pair of refrigerator compartment doors; a main water tank, provided within the refrigerator compartment, being configured to cool water supplied from outside; a water purifying device, provided at the cabinet, being configured to purify water; a sub-water tank provided at said one of the pair of refrigerator compartment doors, being configured to cool the water from the main water tank; and a water supply path through which the water purifying device, the main water tank, the sub-water tank, the dispenser and the ice maker are in fluid connection, wherein the water supply path includes: a first branch valve, positioned at the cabinet side, being connected to an outlet side of the water purifying device and the main water tank to selectively supply the purified water or the cooled water toward the side of said one of the refrigerator compartment doors; a second branch valve, provided at said one of the refrigerator compartment doors, being connected to an inlet side of the dispenser and the ice maker to selectively supply the water coming through the first branch valve to the dispenser or the ice maker; and a discharging valve disposed at one of the pair of refrigerator compartment doors and configured to open and close the water supply path to supply the cooled water to the dispenser, wherein the refrigerator further comprises a hinge configured to rotatably connect said one of the pair of the refrigerator compartment doors with the cabinet, wherein a part of the water supply path connected to an outlet side of the first branch valve and extending into said one of the refrigerator compartment doors consists of a single passage passing through the hinge. a first branch valve, positioned at the cabinet side, being connected to an outlet side of the water purifying device and the main water tank to selectively supply the purified water or the cooled water toward the side of said one of the refrigerator compartment doors; a second branch valve, provided at said one of the refrigerator compartment doors, being connected to an inlet side of the dispenser and the ice maker to selectively supply the water coming through the first branch valve to the dispenser or the ice maker; and a discharging valve disposed at one of the pair of refrigerator compartment doors and configured to open and close the water supply path to supply the cooled water to the dispenser, wherein the refrigerator further comprises a hinge configured to rotatably connect said one of the pair of the refrigerator compartment doors with the cabinet, wherein a part of the water supply path connected to an outlet side of the first branch valve and extending into said one of the refrigerator compartment doors consists of a single passage passing through the hinge.