The light source device can supply white light including a predetermined wavelength band and special light including a predetermined wavelength band and narrower than the white light. A first light source that emits light in one wavelength band, a second light source that emits light in a second wavelength band including a predetermined wavelength band, and one of light in the first and second wavelength bands Light in a predetermined wavelength band is extracted from the light, light in a third wavelength band other than the predetermined wavelength band is extracted from the other light in the first and second wavelength bands, and the predetermined wavelength band is extracted. When supplying white light and the optical member that mixes and emits the light of the first wavelength and the light of the third wavelength band, the first and second light sources emit light at the same time and the first light is supplied when the special light is supplied. And a control unit that sets the light amount ratio of the second light source to a ratio different from that when white light is supplied.光源装置は、所定の波長帯域を含む白色光と、所定の波長帯域を含みかつ白色光より狭帯域な光である特殊光と、を供給することが可能であり、所定の波長帯域を含む第１の波長帯域の光を発する第１の光源と、所定の波長帯域を含む第２の波長帯域の光を発する第２の光源と、第１及び第２の波長帯域の光のうちの一方の光から所定の波長帯域の光を抽出し、第１及び第２の波長帯域の光のうちの他方の光から所定の波長帯域以外の第３の波長帯域の光を抽出し、所定の波長帯域の光及び第３の波長帯域の光を混合して出射する光学部材と、白色光を供給する際に、第１及び第２の光源を同時に発光させ、特殊光を供給する際に、第１及び第２の光源の光量比を白色光の供給時とは異なる比とする制御部と、を有する。
