An IPS mode LCD device and a method for fabricating the same is disclosed to improve an aperture ratio without an increase in resistance of a data line. The device includes a substrate; a plurality of gate lines formed on the substrate; a plurality of data lines formed substantially perpendicular to the gate lines to define pixel regions, each of the data lines having at least one extending part at both sides thereof; a common line formed substantially parallel to the gate lines; a common electrode perpendicularly extending from the common line; a thin film transistor formed at a crossing portion of the gate and data lines; and a pixel electrode connected to a drain electrode of the thin film transistor, and formed substantially parallel to the common electrode.