A refrigerator comprising: a main body; a door coupled to a front surface of the main body; a bracket coupled to a front surface of the door and comprising a roller; a sliding plate supported on the roller of the bracket and to slide along a vertical direction; a display supported on the sliding plate; and a position fixing device configured to fix a position of the sliding plate, wherein the position fixing device comprises: a spur gear coupled to the bracket; a rack gear engaged with the spur gear to allow a moving of the sliding plate; and a stopper configured to prevent a rotation of the spur gear while being engaged with the rack gear when the moving of the sliding plate is stopped to thereby fix the position of the sliding plate, wherein the refrigerator further comprises: a rotation protrusion provided at a central portion of the spur gear to rotatably support the spur gear; a slot provided on the bracket to rotatably accommodate one end of the rotation protrusion; and a guide groove provided on the sliding plate to guide another end of the rotation protrusion to be moved along the vertical direction, and wherein the slot comprises a first slot extending along the vertical direction, and a second slot extending along a horizontal direction from an upper end of the first slot. a main body; a door coupled to a front surface of the main body; a bracket coupled to a front surface of the door and comprising a roller; a sliding plate supported on the roller of the bracket and to slide along a vertical direction; a display supported on the sliding plate; and a position fixing device configured to fix a position of the sliding plate, wherein the position fixing device comprises: a spur gear coupled to the bracket; a rack gear engaged with the spur gear to allow a moving of the sliding plate; and a stopper configured to prevent a rotation of the spur gear while being engaged with the rack gear when the moving of the sliding plate is stopped to thereby fix the position of the sliding plate, wherein the refrigerator further comprises: a rotation protrusion provided at a central portion of the spur gear to rotatably support the spur gear; a slot provided on the bracket to rotatably accommodate one end of the rotation protrusion; and a guide groove provided on the sliding plate to guide another end of the rotation protrusion to be moved along the vertical direction, and wherein the slot comprises a first slot extending along the vertical direction, and a second slot extending along a horizontal direction from an upper end of the first slot. a spur gear coupled to the bracket; a rack gear engaged with the spur gear to allow a moving of the sliding plate; and a stopper configured to prevent a rotation of the spur gear while being engaged with the rack gear when the moving of the sliding plate is stopped to thereby fix the position of the sliding plate, wherein the refrigerator further comprises: a rotation protrusion provided at a central portion of the spur gear to rotatably support the spur gear; a slot provided on the bracket to rotatably accommodate one end of the rotation protrusion; and a guide groove provided on the sliding plate to guide another end of the rotation protrusion to be moved along the vertical direction, and wherein the slot comprises a first slot extending along the vertical direction, and a second slot extending along a horizontal direction from an upper end of the first slot. a rotation protrusion provided at a central portion of the spur gear to rotatably support the spur gear; a slot provided on the bracket to rotatably accommodate one end of the rotation protrusion; and a guide groove provided on the sliding plate to guide another end of the rotation protrusion to be moved along the vertical direction, and wherein the slot comprises a first slot extending along the vertical direction, and a second slot extending along a horizontal direction from an upper end of the first slot.