Organic light emitting display device and a method of manufacture the same are provided. The organic light emitting display device comprises a substrate with an emission area and a non-emission area, an overcoat layer on the substrate with a plurality of micro lenses in the emission area, a first electrode, which is arranged on the overcoat layer and is arranged in the entire emission area EA and part of the non-emission area, an organic light emitting layer, which is arranged on the substrate, wherein at least one layer of organic light emitting layer is flatly formed in the emission area, and a second electrode, which is arranged on the organic light emitting layer. The light extraction efficiency and light emission efficiency are both improved.