An organic light emitting element which can employ non-sublimable (non-volatile) or insoluble materials while keeping the same level of light emission as prior art is provided. Dispersive particles (202a) of an insoluble organic material that is dispersed in a solvent (201) in which a soluble organic material (203a) is dissolved is applied to a substrate (200) that has an electrode. Then, the solvent (201) is vaporized by heat treatment to form a uniform film (203b) of the soluble organic material in which aggregations (clusters) of the insoluble organic material are scattered. Since the soluble organic material film (203b) is thoroughly uniform. defects such as breakdown can be avoided to make it a fully functional organic light emitting element.