A method for producing an organic electroluminescent device, the organic electroluminescent device comprising a first electrode formed on a substrate, a thin film layer on the first electrodes, the thin film layer comprising at least an emitting layer comprising an organic compound, a second electrode formed on the thin film layer, and a plurality of luminescent regions on the substrate, wherein the method for producing the organic electroluminescent device comprises forming spacers having a height exceeding a thickness of the thin film layer on the substrate and vapor-depositing a deposit while a mask portion of a shadow mask is kept in contact with the spacers, the shadow mask comprising apertures having reinforcing lines. Highly precise fine patterning can be effected under wide vapor deposition conditions without degrading the properties of organic electroluminescent elements, and high stability can be achieved by the method without limiting the structure of the electroluminescent device.