A method of fabricating a liquid crystal display device according to the present invention includes a first mask process of forming a first mask pattern group including a gate line, a gate electrode, a common line and a common electrode on a substrate, a second mask process of forming a gate insulating film on the first mask pattern group and a semiconductor pattern and an opaque conductive pattern on the gate insulating film, and a third mask process of forming a transparent conductive pattern on the opaque conductive pattern and forming a protective film, wherein one end of the protective film is contacted with one end of the transparent conductive pattern.