An OLED device includes a thin film transistor including an active layer, a gate bottom electrode, a gate top electrode, an insulating layer covering the gate electrode, and a source electrode and a drain electrode on the insulating layer contacting the active layer; an organic light-emitting device electrically connected to the thin film transistor and including a sequentially stacked pixel electrode, on the same layer as the gate bottom electrode, emissive layer, and, opposite electrode, a pad bottom electrode on the same layer as the gate bottom electrode and a pad top electrode pattern on the same layer as the gate top electrode, the pad top electrode pattern including openings exposing the pad bottom electrode, and an insulation pattern covering the upper surface of the pad top electrode pattern on the same layer as the insulating layer, on an upper surface of the pad bottom electrode.