An organic light emitting display device according to one or more embodiments is provided. An organic light emitting display device according to an exemplary embodiment of the present invention includes a reinforcement member disposed on a substrate and having a refractive index of greater than about 2.1, a transflective electrode disposed on the reinforcement member and contacting the reinforcement member, a pixel electrode disposed on the transflective electrode and contacting the transflective electrode, an organic light emitting member disposed on the pixel electrode, and a common electrode disposed on the organic light emitting member.