A display device according to an embodiment may include a base layer including a first surface and a second surface, a pixel circuit layer including a first line on the first surface, a display element layer on the pixel circuit layer and including a display element, a thin film encapsulation layer on the display element layer, a first protective layer on the thin film encapsulation layer, and a second line on the second surface to correspond to the first line. The first protective layer may include a transparent insulating material.