To eliminate the coupling between a data line and a pixel potential.

The liquid crystal display device which has thin-film transistors formed on a substrate 1 has a data line 11 and a pixel potential application metal layer 12 for applying a pixel potential to a transparent electrode 14 and the data line 11 and pixel potential application metal layer 12 are arranged at an interval; and a light shield metal layer 2 is arranged opposite the interval and the light-shield metal layer 2, data line 11, and pixel potential application metal layer 12 cooperate to obtain light shield effect.