A refrigerator comprising: a cabinet that defines a storage chamber; a door comprising a door part configured to open and close the storage chamber and a drawer part configured to provide upwardly opened storage space, wherein a front surface of the door part is defined by an outer plate, and a rear surface may be defined by a door liner; and a rail configured to connect the door to the cabinet, the rail being configured to allow the door to be inserted or withdrawn therethrough, characterized in that the refrigerator comprises: a driving device accommodated in a recessed portion of the door liner to provide power; a door cover configured to define an outer appearance of the rear surface of the door part and to cover the driving device mounted on the door part; and an elevation device provided on a bottom surface of the inner side of the drawer part, the elevation device being connected to the driving device through a cover opening and drawer opening to allow a portion of the drawer part to vertically move, wherein the driving device comprises: a motor assembly; a screw unit (50, 50a) comprising a screw that rotates by the motor assembly and a screw holder (56, 56a) elevated along the screw; and a lever configured to connect the screw holder (56, 56a) to the elevation device, the lever rotating by the elevation of the screw holder (56, 56a), wherein an elevation detection device configured to detect an operation state of the driving device to determine whether the elevation device completely ascends or descends is disposed on one side of the driving device. a cabinet that defines a storage chamber; a door comprising a door part configured to open and close the storage chamber and a drawer part configured to provide upwardly opened storage space, wherein a front surface of the door part is defined by an outer plate, and a rear surface may be defined by a door liner; and a rail configured to connect the door to the cabinet, the rail being configured to allow the door to be inserted or withdrawn therethrough, characterized in that the refrigerator comprises: a driving device accommodated in a recessed portion of the door liner to provide power; a door cover configured to define an outer appearance of the rear surface of the door part and to cover the driving device mounted on the door part; and an elevation device provided on a bottom surface of the inner side of the drawer part, the elevation device being connected to the driving device through a cover opening and drawer opening to allow a portion of the drawer part to vertically move, wherein the driving device comprises: a motor assembly; a screw unit (50, 50a) comprising a screw that rotates by the motor assembly and a screw holder (56, 56a) elevated along the screw; and a lever configured to connect the screw holder (56, 56a) to the elevation device, the lever rotating by the elevation of the screw holder (56, 56a), wherein an elevation detection device configured to detect an operation state of the driving device to determine whether the elevation device completely ascends or descends is disposed on one side of the driving device. a driving device accommodated in a recessed portion of the door liner to provide power; a door cover configured to define an outer appearance of the rear surface of the door part and to cover the driving device mounted on the door part; and an elevation device provided on a bottom surface of the inner side of the drawer part, the elevation device being connected to the driving device through a cover opening and drawer opening to allow a portion of the drawer part to vertically move, wherein the driving device comprises: a motor assembly; a screw unit (50, 50a) comprising a screw that rotates by the motor assembly and a screw holder (56, 56a) elevated along the screw; and a lever configured to connect the screw holder (56, 56a) to the elevation device, the lever rotating by the elevation of the screw holder (56, 56a), wherein an elevation detection device configured to detect an operation state of the driving device to determine whether the elevation device completely ascends or descends is disposed on one side of the driving device. a motor assembly; a screw unit (50, 50a) comprising a screw that rotates by the motor assembly and a screw holder (56, 56a) elevated along the screw; and a lever configured to connect the screw holder (56, 56a) to the elevation device, the lever rotating by the elevation of the screw holder (56, 56a), wherein an elevation detection device configured to detect an operation state of the driving device to determine whether the elevation device completely ascends or descends is disposed on one side of the driving device.