An organic light emitting display device including a first electrode that has a three layer structure, improved adhesion, and is simple to fabricate, and a method of fabricating the same, are provided. The organic light emitting display device includes: a substrate; a first electrode disposed on the substrate, the first electrode comprising a first metal layer including Mo or an Mo alloy, a second metal layer disposed on the first metal layer and including Ag or an Ag alloy, and a third metal layer disposed on the second metal layer and including a transparent conductive oxide layer; an organic layer disposed on the first electrode and including an organic emission layer; and a second electrode disposed on the organic layer.