According to one embodiment, a display device includes a display panel including a first area and a second area adjacent to the first area, and a wiring substrate mounted on the second area of the display panel, wherein the first area includes an insulating substrate, an inorganic insulating film disposed on the insulating substrate, and a signal line disposed on the inorganic insulating film, and the second area includes a protective layer and the signal line disposed continuously from the first area on the protective layer.