To provide an endoscopic system capable of relaxing the pain of a patient at the time of insertion by achieving the miniaturization (reduction of the diameter) of the flexible tube of the insertion part inserted into the body cavity and capable of changing the color (wavelength) of illumination light by a simple constitution.

This endoscope 100 includes the flexible tube 200 of the insertion part inserted into a lumen and an illumination means 700 for irradiating an observation region with illumination light. Further, the illumination means 700 includes the organic EL element 710 provided to the leading end surface 231 of the flexible tube 200 of the insertion part. The organic EL element 710 can emit two or more illumination lights different in emission color.