A display device is disclosed. In one aspect, the display device includes a substrate, a first signal line formed over the substrate and a first insulating layer formed over the substrate and the first signal line. The display device also includes a second signal line formed over the first insulating layer and including an overlapping area that overlaps the first signal line, a second insulating layer formed over the second signal line and having a via hole that exposes at least a part of the overlapping area. The display device further includes an auxiliary wiring layer covering the via hole and connected to the overlapping area through the via hole.