The present invention provides a method for manufacturing a liquid crystal display device. In openings of a first light transmission type photosensitive resin formed on an insulating substrate, a gate electrode, a source line, and a pixel contact layer are prepared. On these components, a gate insulator, a semiconductor layer, an ohmic contact layer (n+ semiconductor layer) and a protective film are prepared. Further, in openings of a second light transmission type photosensitive resin, a source electrode, a drain electrode, and a pixel electrode are prepared. Also, the crossing portion connecting line formed at the opening of the second light transmission type photosensitive resin is, similarly to the source line or the gate line, made of baked silver produced by baking an ink containing silver fine particles plotted by ink jet process.