A display device comprises a display panel, wherein the display panel includes a display area and a non-display area, a plurality of display elements are arranged on the display area, and one or morewirings for driving a plurality of display elements are arranged on the non-display area; a back cover is attached to one surface of the display panel and has a plurality of opening units disposed therein. A roller unit winds or unfolds the back cover and the display panel, and a lifting unit moves the back cover and the display panel in a vertical direction. The opening units overlap the displaypanel. Each of the opening units is staggered with respect to the openings of neighboring rows. A back plate is greater than the display panel in terms of size.