The purpose is to realize a high definition liquid crystal display device having touch panel function. The concrete structure is: The first substrate comprising; a plurality of scanning lines and a plurality of video signal lines, a semiconductor layer, a pixel electrode, a common electrode formed in plural pixels in common, a through hole to connect the semiconductor layer and the pixel electrode, a plurality of common metal wirings, which are formed on the common electrode and formed along the video signal lines; wherein the common electrode has a slit extending in the same direction as the scanning line extends, a bridge wiring is formed over the common metal wiring interposed by an insulating film at the place where the common metal wiring and the slit cross to each other, the common metal wiring and the bridge wiring are electrically connected to the common electrode near the edges of the slit.