An organic light emitting display device includes a first substrate, a thin film transistor disposed on the first substrate, a first electrode electrically coupled to the thin film transistor, a pixel defining layer disposed on the first substrate and the first electrode to define unit pixels, a plurality of organic light emitting structure disposed on the first electrode, where in the organic light emitting structure includes a first organic light emitting structure, a second organic light emitting structure and a third light emitting structure, a second electrode which covers the first through third organic light emitting structures and the pixel defining layer; a metamaterial layer disposed on the second electrode corresponding to the organic light emitting structures, an encapsulation member which covers the second electrode and the metamaterial layer, and a second substrate disposed on the encapsulation member opposite to the first substrate.