To eliminate an adverse influence that a fluorescence agent included in resin exerted on the light of a light emitting element except for a light emitting element used as an excitation source of fluorescence agent.

An optical source is provided with first and second light emitting elements 8 and 9 emitting first and second colors, a fluorescence agent which is excited by a first luminescent color and emits a third color, first resin 11 comprising a fluorescence agent and covers the first light emitting element and second resin 12 covering first resin 11 and the second light emitting element 9 arranged outside the first resin 11. Light obtained by mixing first, second and third luminescent colors is used as a luminescent color.