To provide an electro-optical device in which the fluidity of a material for forming the underlying layer of a gas barrier layer is controlled, and the volume-change of the underlying layer is suppressed, so that stress-concentration on the gas barrier layer is relaxed, and to provide a method of producing the same and an electronic apparatus. In an electro-optical device having, on a substrate, a plurality of first electrodes, a bank structure having a plurality of openings positioned correspondingly to the formed first electrodes, electro-optical layers arranged in the respective openings, and a second electrode covering the bank structure and the electro-optical layers, the device includes a buffer layer formed so as to cover the second electrode and have a substantially flat upper surface, and a gas barrier layer covering the buffer layer.