A display device includes: a substrate including a main display area and a component area, wherein the component area includes a transmission area and an auxiliary display area; a first thin-film transistor disposed in the component area and including a first semiconductor layer and a first gate electrode; a second thin-film transistor disposed in the component area and including a second semiconductor layer and a second gate electrode; a third gate electrode interposed between the first semiconductor layer and the second gate electrode; a first wiring extending within the auxiliary display area, and provided on a same layer as the third gate electrode; and a second wiring extending within the auxiliary display area, and provided on a same layer as the second gate electrode, wherein the first wiring and the second wiring are electrically connected to each other through a first contact hole penetrating insulating layers.