A display device includes: a substrate including an opening area, a display area, and a non-display area arranged between the opening area and the display area; a first thin-film transistor arranged on the substrate and including a first semiconductor layer including a silicon semiconductor; a first insulating layer covering the first semiconductor layer and defining a lower contact hole overlapping the non-display area, a second thin-film transistor arranged on the first insulating layer and including a second semiconductor layer including an oxide semiconductor; a second insulating layer covering the second semiconductor layer and defining an upper contact hole overlapping the lower contact hole; a display element overlapping the display area, a lower conductive layer overlapping the lower contact hole; and an upper conductive layer arranged on the second insulating layer and connected to the lower conductive layer through the lower contact hole and the upper contact hole.