A display device includes: a first substrate, a barrier film, and a second substrate; a thin-film transistor layer, an emission material layer, an encapsulation layer and a touch detecting unit stacked on the second substrate; and a pad area in a non-display area and comprising pads connected to a driving substrate and facing the first substrate, the pads comprising: a pad contact hole formed by etching the second substrate and the barrier film; a first inorganic film and a pad electrode stacked on an inner circumferential surface of the pad contact hole; and a rear contact hole etched through a portion of the first substrate, and a pad bonded to the rear contact hole, with a middle hole connecting the pad contact hole with the rear contact hole, and the pad of the driving substrate is electrically connected to the pad electrode through a lower conductive ink.