To provide an organic electroluminescent element with long life and its manufacturing method.

An anode 3, a hole transport layer 4, an electron block layer 5, a light-emitting layer 6, an electron injection layer 7 and a cathode are laminated in that order on a transparent substrate 2 to manufacture the organic electroluminescent element 1. Then, at the time of forming of the light-emitting layer 5, an organic material is dissolved in a solvent such as xylene to prepare organic solution, and this organic solution layer is dried to form the light-emitting layer 6. Here, a solvent with a moisture concentration and an oxygen concentration regulated at 100 ppm by mass or less is used, for instance, one with less moisture concentration and less oxygen concentration than is used at an atmosphere in which coating and drying of the organic solution takes place.

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