Embodiments of the present invention include an organic light emitting display device and a method for fabricating the same. The organic light emitting display device may include a thin film transistor on a base substrate and including a semiconductor layer, a gate electrode, a source electrode, and a drain electrode; and an organic light emitting diode, which includes a first electrode connected to the drain electrode, an organic layer on the first electrode, and a second electrode on the organic layer. The drain electrode may have a larger area than the first electrode.