A touch sensing unit including a touch sensing area having long sides and short sides, first touch electrodes arranged in the touch sensing area along the long sides of the touch sensing area, second touch electrodes arranged in the touch sensing area along the short sides of the touch sensing area, first connecting electrodes electrically connecting the first touch electrodes, and second connecting electrodes electrically connecting the second touch electrodes, in which a thickness of the second connecting electrodes is different from thicknesses of the first touch electrodes and the second touch electrodes, respectively.