A display device comprises a pixel array in a display area, a fan-out wiring in a peripheral area adjacent to the display area, and in a sealing area surrounding the display area, and including a first fan-out line at a first layer, and a second fan-out line at a second layer, a transmission wiring in the sealing area, and including a first transmission line at the first layer, and a second transmission line at the second layer and electrically connected to the first transmission line, the first transmission line and the second transmission line being between the first fan-out line and the second fan-out line in a plan view, and a sealing member in the sealing area.