An organic light-emitting display device includes an active layer of a thin film transistor (TFT) formed on a substrate; a gate electrode of the TFT, wherein a first gate electrode including a transparent conductive material, a first insulating layer, and a second gate electrode are sequentially stacked; a pixel electrode disposed on the first insulating layer and including the transparent conductive material; a source electrode and a drain electrode of the TFT, a second insulating layer disposed between the source electrode and the drain electrode; a light reflector including the same material as the source electrode and the drain electrode, and disposed on the pixel electrode; an emission layer disposed on top of the pixel electrode and surrounded by an inner side of the light reflector; and a counter electrode facing towards the pixel electrode, wherein the emission layer is disposed between the pixel electrode and the counter electrode.