In an organic EL display device having at least one electrode, a light emitting material layer and another electrode that are stacked in each pixel region formed on a surface of a substrate, wherein the light emitting material layer is formed in an opening portion of a bank film which separates the pixel region from other pixel regions arranged close to the pixel region so that the inside of the opening portion of the bank film is filled with the light emitting material layer, a light reflection function is imparted to at least a side wall surface of the opening portion of the bank film, so that the light take-out efficiency of the organic EL display device is enhanced.