A liquid crystal display device according to an embodiment of the present invention includes: a gate line formed on a substrate; a data line to provide a pixel area by crossing the gate line with a gate insulating film therebetween; a common line formed in parallel to the gate line; a thin film transistor connected to the gate line and the data line; a passivation film formed to cover the thin film transistor; a contact hole which penetrates the passivation film; a pixel electrode connected with the thin film transistor; and a common electrode connected with the common line to form a horizontal electric field with the pixel electrode, and wherein at lease one of the gate line, the data line, the common line, the pixel electrode and the common electrode is composed of a first conductive layer and a second conductive layer which is formed to cover the first conductive layer by being extended more outward than the first conductive layer, and is formed to have a border with the passivation film within the contact hole.