An array substrate for IPS mode LCD device includes first and second gate lines on a substrate including first and second pixel regions; a first common connection pattern in an upper side of each of the first and second pixel regions; first and second outmost common electrodes extending from the first common connection pattern; first and second data lines crossing the first and second gate lines, the first and second pixel regions adjacent to each other along the first and second data lines; a TFT connected to the first gate line and the first data line pixel electrodes; a pixel connection pattern connected to the drain electrode common electrodes alternately arranged with the pixel electrodes; and a second common connection pattern at a lower side of the pixel regions and connected to the second outmost common electrode.