The present invention provides a light emitting element comprising a first substrate, a light emitting unit disposed on the first substrate, at least a selective reflection layer disposed on an emitting side of the light emitting unit so that a light of a first color emitted from the light emitting unit passes through the selective reflection layer, and a fluorescent layer disposed on the emitting side of the light emitting unit and converting the light of the first color passing therethrough into a light of a second color, wherein a light of a mixed color is formed by the lights of the first and second color and only the light of the second color is reflected by the selective reflection layer.