Provided is an organic light-emitting display device (OLED) and method of manufacturing the same. The OLED comprises a substrate and a thin film transistor, with source/drain electrodes, located at a predetermined area on the substrate. A passivation layer is located on the source/drain electrodes with a via hole exposing one of the source/drain electrodes. A first pixel electrode is located at the bottom of the via hole, electrically coupled to the exposed source/drain electrode, and extending onto the side wall of the via hole and the passivation layer. A planarization pattern fills the via hole in which the first pixel electrode is located and exposes the portion of the first pixel electrode on the passivation layer.