A display device may include a first substrate, a first conductive pad, a second conductive pad, a first pad electrode, and a second pad electrode. The first substrate may include a first face and a second face. The first conductive pad may be disposed on the first face. The second conductive pad may be disposed on the first face and may be spaced from the first conductive pad. The first pad electrode may be disposed on the second face, may be electrically connected to the first conductive pad, and may include a protrusion. The second pad electrode may be disposed on the second face, may be electrically connected to the second conductive pad, may be spaced from the first pad electrode, and may include a recess. The protrusion of the first pad electrode may be partially inside the recess the second pad electrode.