A light source device for an endoscope, characterized by having a light source for supplying illuminating light to an object, endoscope connection means optically connected to an endoscope that has discrimination information for discriminating the kind of endoscope, discrimination means for discriminating the endoscope based on the discrimination information of the endoscope connected to the endoscope connection means, change means for the changing illumination condition of the illuminating light, and control means for controlling the change means based on the result of discrimination by the discrimination means.
