A light-emitting element having at least a light-emitting region arranged between a pair of electrodes is provided, in which the light-emitting region contains either (A) a light-emitting material, a compound capable of sustaining the charge transport, and a heavy metal as a mixture, or (B) a compound that is capable of sustaining the charge transport and that includes both of a portion for contributing to the charge transport and a portion for contributing to the light emission within the compound, and a heavy metal as a mixture. A method for producing the light-emitting element, and a display device in which a plurality of the light-emitting elements are used, are provided also. With the light-emitting element of the present invention, it is possible to provide an organic thin film electroluminescent element that has a high emission efficiency, whose materials are easy to synthesize as compared with a heavy metal complex-doped element that has been studied widely in recent years, that has a small concentration quenching, and that is stable and uniform. Therefore, the light-emitting element of the present invention is applicable as a light source for use in a flat-panel-type self-luminous display device and for other various purposes such as communication and illumination.