According to one embodiment, a display device includes a first substrate including a first area and a second area, the first area including a display area where pixels are arranged, and the second area being adjacent to the first area and where wirings are arranged, wherein the wirings are covered with a protection layer, the second area includes a peripheral area and a central area in an arrangement direction of the wirings, and a thickness of at least one of the first substrate and the protection layer varies between the peripheral area and the central area.