To increase the pixel opening rate while connecting a pixel electrode to a semiconductor layer and to make high-quality image display possible in a rather simple structure in an electro-optic device using a TFT active matrix driving system.

The pixel electrode and the TFT are connected by way of a first barrier layer 80a through a contact hole 8a and a contact hole 8b. A second barrier layer 80b is formed wider than a data line 6a, and one end of the layer 80b is overlapped on the pixel electrode 9a to determine the pixel opening region.