To provide an organic electroluminescent device, a manufacturing method thereof, and an electronic apparatus, which can reduce wiring line resistance, lower power consumption, suppress heating and uniformize brightness. There is provided a method of manufacturing an organic electroluminescent device comprising, on a first electrode, a light-emitting functional layer surrounded by a first partition and a second partition. The method comprises a step of sequentially film-forming a first electrode material and a first partition material on an interlayer insulating film, a step of patterning the first electrode material and the first partition material with a mask to form the first electrode and the first partition in the same shape, and a step of forming the second partition on the interlayer insulating film and the first partition material.