A display device includes a first substrate, first signal lines, and a first signal pad array. The first signal pads each includes a first pad portion connected to a corresponding first signal line, a second pad portion having a width larger than that of the first pad portion, and a third pad portion connecting the first pad portion with the second pad portion and having a width smaller than the width of the second pad portion. The first signal pads are disposed in a shape symmetrical with respect to an imaginary line. Each first signal pad has an angle between a direction in which the third pad portion is extended and a direction in which the second pad portion is extended. The angle of a first signal pad closer to the imaginary line is smaller than the angle of another first signal pad further away from the imaginary line.