A display device includes a substrate including a main display area, main display elements being in the main display area; a component area, auxiliary display elements and a transmission area being in the component area; and a peripheral area outside the main display area; an initialization voltage line in the main display area and extending in a first direction; a bottom metal layer in the component area between the substrate and the auxiliary display elements; and a bias line in the main display area and extending in the first direction, the bias line being connected to the bottom metal layer and being at a same layer as the initialization voltage line, wherein the bias line and the initialization voltage line are alternately arranged along a second direction crossing the first direction, in a first region of the main display area around the component area.