Disclosed is a refrigerator including a main body cabinet forming a storage compartment with a front opening, a door opening and closing the front opening of the storage compartment, and an ice making tray mounted to the door and making ice. The refrigerator includes a water supplying pipe which receives water from a water supplying source; a discharging pipe guide which includes a hollow part and is mounted to a through part penetrating from an outside region of the door to an upper side of the ice making tray; and a discharging pipe which includes a first end detachably connected to the water supplying pipe, and a second end disposed above the ice making tray after passing through the hollow part and detachably coupled to the door.