PROBLEM TO BE SOLVED: To irradiate both of a leading end direction and a side direction of an insertion part of an endoscope with illumination light, and to optionally adjust the light amount of the illumination light irradiated to the directions.SOLUTION: An optical fiber wherein a fluorescent substance extended in the insertion part and emitting fluorescence having a wavelength contained in the illumination light by irradiation of excitation light is contained in a clad is extended in the insertion part. On a side surface of the insertion part, a transmitting part 30g transmitting the fluorescence emitted from the clad of the optical fiber is provided, and a light-blocking member 35 for adjusting the light amount of the fluorescence irradiated to the side direction of the insertion part by transmitting the transmitting part 30g.COPYRIGHT: (C)2012,JPO&INPIT【課題】内視鏡の挿入部の先端方向と側方との両方に照明光を照射するとともに、これらの方向に照射される照明光の光量を任意に調整する。【解決手段】挿入部内に延設され、励起光の照射によって照明光に含まれる波長の蛍光を発する蛍光体がクラッドに含有された光ファイバを挿入部内に延設し、その挿入部の側面に光ファイバのクラッドから発せられた蛍光を透過する透過部30gを設けるとともに、その透過部30gを透過して挿入部の側方に向けて照射される蛍光の光量を調整するための遮光部材35を設ける。【選択図】図7
