A refrigerator including a refrigerator main body having a refrigerating chamber therein, a cold air passage duct disposed within the refrigerator main body and provided with a cold air passage therein to discharge the cold air into the refrigerating chamber, a control case coupled to one surface of the cold air discharge duct and having a cold air discharge opening through which the cold air is discharged, and a shutter disposed between the cold air passage duct and the control case, and reciprocally movable in one direction to open and close at least part of the cold air discharge opening, and a knob link rotatably connected to the cold air passage duct to press the shutter such that the shutter is reciprocally movable.