In a liquid crystal display device that prevents corrosion of a signal line in the device, a plurality of signal lines are provided at the inner side of a cutting line on a substrate. A shorting bar is provided at the outer side of the cutting line. A connection line connects the signal lines to the shorting bar in such a manner to cross the cutting line. Thus, the signal line is connected to the shorting bar with the aid of the connection line formed from a transparent conductive material at an area corresponding to the cutting line of a lower substrate. The connection line is exposed when the lower substrate is cut along the cutting line, so that corrosion of the signal line can be prevented.