an in - plane switching mode liquid crystal display device comprises first and second substrates , a plurality of gate and data bus lines defining pixel regions and arranged on the first substrate , a plurality of data electrodes on same plane of the data bus lines these some parts are overlapped with adjacent gate bus line , a passivation layer on the data electrodes , a plurality of common electrodes on the passivation layer these some parts are overlapped with adjacent data electrodes , and a liquid crystal layer between the first and second substrates .