A display device includes a substrate; and a driving pad disposed on the substrate, wherein the driving pad includes a first pad portion and a second pad portion alternately arranged along a direction, wherein each of the first pad portion and the second pad portion includes first data pads and signal pads, wherein the first data pads of the first and second pad portions include a first side and a second side different from the first side, wherein the signal pads of the first pad portion are disposed on the first side of the first data pads of the first pad portion, and the signal pads of the second pad portion are disposed on the second side of the first data pads of the second pad portion, and wherein the first data pads provide a data signal to pixels, and the signal pads provide a driving voltage to the pixels.