A
display device having a plurality of pixels and which realizes a color display with emitted light of at least two wavelengths wherein each pixel has a microresonator structure between a lower reflective film formed on a side near a substrate and an upper reflective film formed above the lower reflective film with an organic light emitting element layer therebetween. The lower reflective film is made of a
metal thin film and a conductive
resonator spacer layer which functions as a first
electrode is provided between the lower reflective film and the organic light emitting element layer. A thickness of the conductive
resonator spacer layer is changed by changing a number of
layers or a number of remaining
layers of transparent conductive
metal oxide layers made of ITO corresponding to pixels of different
light emission wavelengths. An amorphous ITO layer at an upper layer is selectively removed from above a polycrystalline ITO layer at a lower layer using the polycrystalline ITO layer as an
etching stopper so that the thickness is changed corresponding to the thickness of the ITO layer to be formed and not removed. Light obtained in the organic light emitting element layer is intensified by the microresonator structure in which the optical length is adjusted by the conductive
resonator spacer layer and is emitted to the outside.