Provided is a display device. The display device comprises: a display module including a display panel, wherein the display panel includes a display area having a plurality of pixels and an alignment mark area surrounded by the display area, and a display driver driving at least one of the plurality of pixels in the alignment mark area to form an alignment mark; and a stereoscopic lens including a base disposed on the display module, a plurality of lenses disposed on the base at an angle offset from a side of the display module, and a marking portion formed on one or more of the plurality of lenses to overlap the alignment mark area.