A display device may include a substrate including a display area and a bending area, a buffer layer disposed on the substrate, a first dummy pattern disposed in the bending area on the buffer layer; a first insulating layer disposed on the buffer layer, the first insulating layer exposing an upper surface of the first dummy pattern, a second insulating layer disposed on the first insulating layer, the second insulating layer having an opening exposing an upper surface of the first dummy pattern, a second dummy pattern disposed on the first dummy pattern, and a transmission line disposed on the second dummy pattern.