A display device includes a substrate; an insulating layer in contact with a first surface of the substrate; a display region with a plurality of pixels each including a transistor and a display element on the insulating layer; a terminal region in a region outside the display region over the insulating layer; a wiring between the display region and the terminal region; and a resin film on the substrate. The insulating layer includes an opening in a region between the display region and the terminal region. The resin film is in contact with the first surface in the opening. The wiring is in contact with an upper surface of the resin film through the opening. A surface roughness of the resin film in the opening is larger than a surface roughness of the substrate at a region where the substrate is in contact with the insulating layer.