A refrigerator comprising: a cabinet comprising an inner case defining a storage compartment (111, 112), an outer case surrounding the outside of the inner case, and an insulation material provided between the inner case and the outer case; a storage compartment door (15, 16) to open and to close the storage compartment (111, 112); a cold air duct provided in the storage compartment (111, 112) and disposed in an upper side of the storage compartment (111, 112) to discharge cold air to the storage compartment (111, 112); and a guide duct disposed outside the inner case to communicate with the cold air duct and extending to the storage compartment door (15, 16) to guide the cold air received from the cold air duct to the storage compartment door (15, 16), wherein the cold air duct comprises a frame providing a passage therein, and the frame comprises: a cold air inlet disposed in a side surface of the frame, a first cold air outlet disposed in a front surface of the frame facing the storage compartment door (15, 16) to discharge a portion of the cold air introduced through the cold air inlet to the storage compartment (111, 112), a second cold air outlet disposed in a top surface of the frame to discharge another portion of the cold air introduced through the cold air inlet to the guide duct, characterized in that the frame further comprises: a third cold air outlet disposed in a bottom surface of the frame to discharge a portion of the cold air introduced through the cold air inlet to a discharge duct communicating with the cold air duct, wherein the storage compartment (111, 112) includes a freezing compartment and a refrigerating compartment that are horizontally partitioned by a partition wall, wherein the cold air duct is installed in the refrigerating compartment, and wherein the partition wall includes a connection passage providing a cold air path for supplying cold air into the refrigerating compartment and communicating with the cold air inlet. a cabinet comprising an inner case defining a storage compartment (111, 112), an outer case surrounding the outside of the inner case, and an insulation material provided between the inner case and the outer case; a storage compartment door (15, 16) to open and to close the storage compartment (111, 112); a cold air duct provided in the storage compartment (111, 112) and disposed in an upper side of the storage compartment (111, 112) to discharge cold air to the storage compartment (111, 112); and a guide duct disposed outside the inner case to communicate with the cold air duct and extending to the storage compartment door (15, 16) to guide the cold air received from the cold air duct to the storage compartment door (15, 16), wherein the cold air duct comprises a frame providing a passage therein, and the frame comprises: a cold air inlet disposed in a side surface of the frame, a first cold air outlet disposed in a front surface of the frame facing the storage compartment door (15, 16) to discharge a portion of the cold air introduced through the cold air inlet to the storage compartment (111, 112), a second cold air outlet disposed in a top surface of the frame to discharge another portion of the cold air introduced through the cold air inlet to the guide duct, a cold air inlet disposed in a side surface of the frame, a first cold air outlet disposed in a front surface of the frame facing the storage compartment door (15, 16) to discharge a portion of the cold air introduced through the cold air inlet to the storage compartment (111, 112), a second cold air outlet disposed in a top surface of the frame to discharge another portion of the cold air introduced through the cold air inlet to the guide duct, a third cold air outlet disposed in a bottom surface of the frame to discharge a portion of the cold air introduced through the cold air inlet to a discharge duct communicating with the cold air duct, wherein the storage compartment (111, 112) includes a freezing compartment and a refrigerating compartment that are horizontally partitioned by a partition wall, wherein the cold air duct is installed in the refrigerating compartment, and wherein the partition wall includes a connection passage providing a cold air path for supplying cold air into the refrigerating compartment and communicating with the cold air inlet.