The present invention provides an organic EL element on which a protective film, which can be thickened and has a high barrier property, can be formed with high productivity, and a method of manufacturing the same. An organic electroluminescence element having a substrate 1, a first electrode 2 provided thereon, an organic luminescent layer 3, a second electrode 4, and a protective film 5 in this order, wherein the protective film 5 is formed with carbon-containing silicon nitride (SiNxCy), and the carbon content in the protective film 5 is continuously altered. The protective film of the element is formed by using an organic silicon compound, and nitrogen and hydrogen as a source gas, with a plasma CVD method while altering the voltage.