A display device comprising: a display panel having a display area; a back cover disposed on a rear surface of the display panel; a first roller which winds or unwinds the back cover and the display panel; a second roller disposed above the first roller to move in a vertical direction, the back cover and the display panel being overlaid thereon; a rotary shaft axially coupled to the second roller; a fastening unit connected to an end of the rotary shaft; a housing unit for accommodating the first roller, wherein the housing unit includes an opening through which the back cover and the display panel move to an outside and an inside of the housing unit; an extending sheet, wherein the extending sheet is fastened with an upper end of the back cover and a lower end of the back cover is fastened with the first roller, or wherein the extending sheet is disposed on a rear surface of the back cover and has a lower end fastened with the first roller; a third roller disposed in the housing unit, wherein one end of the extending sheet is fastened with the third roller; a first motor disposed on one side of the first roller; a driving shaft coupled to the first motor; a second motor for rotating the third roller, wherein the extending sheet is wound around or unwound from the third roller; and a lifting unit including: - a plurality of links disposed on the rear surface of the back cover and hinged with each other, and - a roller lifting unit coupled to an end of the link, and wherein the roller lifting unit is rotatably fastened with the fastening unit; wherein the first motor is configured to be driven to lift the lifting unit and the second motor is configured to be driven to wind the extending sheets around the third roller to lift and lower the display panel; and wherein the plurality of links is connected to the driving shaft through the other end of the link to be lifted and lowered in the vertical direction in accordance with driving of the first motor. a display panel having a display area; a back cover disposed on a rear surface of the display panel; a first roller which winds or unwinds the back cover and the display panel; a second roller disposed above the first roller to move in a vertical direction, the back cover and the display panel being overlaid thereon; a rotary shaft axially coupled to the second roller; a fastening unit connected to an end of the rotary shaft; a housing unit for accommodating the first roller, wherein the housing unit includes an opening through which the back cover and the display panel move to an outside and an inside of the housing unit; an extending sheet, wherein the extending sheet is fastened with an upper end of the back cover and a lower end of the back cover is fastened with the first roller, or wherein the extending sheet is disposed on a rear surface of the back cover and has a lower end fastened with the first roller; a third roller disposed in the housing unit, wherein one end of the extending sheet is fastened with the third roller; a first motor disposed on one side of the first roller; a driving shaft coupled to the first motor; a second motor for rotating the third roller, wherein the extending sheet is wound around or unwound from the third roller; and a lifting unit including: - a plurality of links disposed on the rear surface of the back cover and hinged with each other, and - a roller lifting unit coupled to an end of the link, and wherein the roller lifting unit is rotatably fastened with the fastening unit; - a plurality of links disposed on the rear surface of the back cover and hinged with each other, and - a roller lifting unit coupled to an end of the link, and wherein the roller lifting unit is rotatably fastened with the fastening unit; wherein the first motor is configured to be driven to lift the lifting unit and the second motor is configured to be driven to wind the extending sheets around the third roller to lift and lower the display panel; and wherein the plurality of links is connected to the driving shaft through the other end of the link to be lifted and lowered in the vertical direction in accordance with driving of the first motor.