A refrigerator comprising: a cabinet defining a refrigerating compartment and a freezing compartment , a freezing compartment door opening or closing the freezing compartment , and an ice making device disposed on a rear surface of the freezing compartment door , wherein the ice making device comprises; a case disposed on the freezing compartment door ; an ice tray rotatably disposed inside the case , the ice tray being configured for making an ice therein; a knob exposed to an outside of the case , the knob being connected to a rotation shaft of the ice tray and rotated by being manipulated from the outside; and an elastic member disposed on the rotation shaft of the ice tray , the elastic member providing an elastic force into the ice tray so that the ice tray is rotated to an original position; wherein the knob comprises: a manipulation part disposed outside the case , the manipulation part being configured to be rotated by a user; and a rotation plate being disposed inside the case , wherein a portion of the rotation plate passes through the case and is coupled to the manipulation part to be thereby rotated together with the manipulation part ; characterized in that the knob further comprises a second guide part , wherein a tray connection part is disposed on the rotation shaft of the ice tray and is coupled to the second guide part when the ice tray is mounted. a cabinet defining a refrigerating compartment and a freezing compartment , a freezing compartment door opening or closing the freezing compartment , and an ice making device disposed on a rear surface of the freezing compartment door , wherein the ice making device comprises; a case disposed on the freezing compartment door ; an ice tray rotatably disposed inside the case , the ice tray being configured for making an ice therein; a knob exposed to an outside of the case , the knob being connected to a rotation shaft of the ice tray and rotated by being manipulated from the outside; and an elastic member disposed on the rotation shaft of the ice tray , the elastic member providing an elastic force into the ice tray so that the ice tray is rotated to an original position; wherein the knob comprises: a manipulation part disposed outside the case , the manipulation part being configured to be rotated by a user; and a rotation plate being disposed inside the case , wherein a portion of the rotation plate passes through the case and is coupled to the manipulation part to be thereby rotated together with the manipulation part ; characterized in that the knob further comprises a second guide part , wherein a tray connection part is disposed on the rotation shaft of the ice tray and is coupled to the second guide part when the ice tray is mounted. a manipulation part disposed outside the case , the manipulation part being configured to be rotated by a user; and a rotation plate being disposed inside the case , wherein a portion of the rotation plate passes through the case and is coupled to the manipulation part to be thereby rotated together with the manipulation part ; characterized in that the knob further comprises a second guide part , wherein a tray connection part is disposed on the rotation shaft of the ice tray and is coupled to the second guide part when the ice tray is mounted. <EOS>