According to one embodiment, a display device includes a display panel including a terminal part, a first insulating layer, a first line disposed on a first surface of the first insulating layer, a second line disposed on a second surface of the first insulating layer opposed to the first surface, a first ground line configured to disposed on the first surface, a second ground line configured to disposed on the first surface, a third ground line configured to disposed on the second surface, a fourth ground line configured to disposed on the second surface, and a circuit substrate including a connector part electrically connected to the terminal part.