A refrigerator comprising: a cabinet which has a storage chamber therein; an inner door which is rotatably connected to a front surface of the cabinet, opens and closes a portion of the storage chamber, and has an access hole of a predetermined size; an accommodation case which is mounted on a rear surface of the inner door, and has a front surface which is opened so as to communicate with the access hole and a rear surface which has a plurality of cool air holes which are vertically spaced apart from each other; an outer door which is rotatably connected to the inner door at a front side of the inner door and selectively opens and closes the access hole; a shielder which is movably coupled to the rear surface of the accommodation case to selectively shield the plurality of cool air holes; and a driver which is provided in the accommodation case for moving the shielder in the up and down direction, wherein the driver includes a guide bar which is extended along a lower surface portion and a rear surface portion of the accommodation case, wherein a front end portion of the guide bar is exposed to a front surface of the inner door, and wherein a rear end portion of the guide bar is positioned at a lower end portion of a side surface of the shielder, characterized in that the refrigerator further comprises a pressing protrusion which protrudes from a rear surface of the outer door, wherein, when the outer door is closed, the pressing protrusion backwardly pushes the front end portion of the guide bar, and wherein the rear end portion of the guide bar is configured to push up a lower end portion of the shielder to open the plurality of cool air holes. a cabinet which has a storage chamber therein; an inner door which is rotatably connected to a front surface of the cabinet, opens and closes a portion of the storage chamber, and has an access hole of a predetermined size; an accommodation case which is mounted on a rear surface of the inner door, and has a front surface which is opened so as to communicate with the access hole and a rear surface which has a plurality of cool air holes which are vertically spaced apart from each other; an outer door which is rotatably connected to the inner door at a front side of the inner door and selectively opens and closes the access hole; a shielder which is movably coupled to the rear surface of the accommodation case to selectively shield the plurality of cool air holes; and a driver which is provided in the accommodation case for moving the shielder in the up and down direction, wherein the driver includes a guide bar which is extended along a lower surface portion and a rear surface portion of the accommodation case, wherein a front end portion of the guide bar is exposed to a front surface of the inner door, and wherein a rear end portion of the guide bar is positioned at a lower end portion of a side surface of the shielder, characterized in that the refrigerator further comprises a pressing protrusion which protrudes from a rear surface of the outer door, wherein, when the outer door is closed, the pressing protrusion backwardly pushes the front end portion of the guide bar, and wherein the rear end portion of the guide bar is configured to push up a lower end portion of the shielder to open the plurality of cool air holes.