PROBLEM TO BE SOLVED: To prevent unevenness of illumination, to reduce the diameter of an insertion part and to emit an illuminating light beam over a wide range.SOLUTION: A lightguide member 10 includes: an incidence unit 11 attached to an end of an endoscope insertion part to cause the illuminating light beam emitted from a light source 4 to be incident an annular lightguide unit 21 capable of guiding in the circumferential direction of a tip of the endoscope insertion part the illuminating light beam caused to be incident by the incidence unit 11 and a scattering unit 31 positioned on one axial end face of the lightguide unit 21 for scattering the illuminating light beam guided by the lightguide unit 21 so that the beam exits from the other axial end face (exit face 27).COPYRIGHT: (C)2012,JPO&INPIT【課題】照明むらの防止および挿入部の細径化を図り、照明光を広範囲に射出する。【解決手段】内視鏡挿入部の先端に取り付けられ、光源4から発せられた照明光を入射させる入射部11と、入射部11により入射された照明光を内視鏡挿入部の先端の周方向に導光可能な円環状の導光部21と、導光部21の軸方向の一端面に配置され、導光部21により導光される照明光を散乱させて軸方向の他端面(射出面27)から射出させる散乱部31とを備える導光部材10を提供する。【選択図】図3
