To provide a distal end structure of an endoscope insertion portion capable of easily detaching a pipe member from a distal end portion main body at the time of repair while reliably fixing a pipe member to a distal end portion main body of an endoscope insertion portion, I will provide a.SOLUTION: According to the present invention, the protruding portion 106 of the forceps pipe 102 is engaged with the positioning groove 124 of the distal end portion main body 48 to regulate the rotation about the central axis of the forceps pipe 102 with respect to the attachment hole 82. Further, according to the present invention, the screw 132 is engaged with the screw receiving hole 108 of the forceps pipe 102 to regulate the position of the forceps pipe 102 in the center axis direction with respect to the mounting hole 82. The screw 132 is screwed into a screw hole 130 formed in the distal end main body 48. The screw hole 130 is formed from the mounting hole 82 to the outer surface 48 B of the distal end portion main body 48.(FIG.【課題】内視鏡挿入部の先端部本体にパイプ部材を確実に固定しつつ、修理時にはパイプ部材を先端部本体から容易に取り外すことができる内視鏡挿入部の先端部構造及び内視鏡を提供する。【解決手段】本発明によれば、先端部本体48の位置決め溝124に鉗子パイプ102の突出部106を係合させて、装着孔82に対する鉗子パイプ102の中心軸周りの回転を規制する。また、本発明によれば、鉗子パイプ102のねじ受け穴108にねじ132を係合させて、装着孔82に対する鉗子パイプ102の中心軸方向の位置を規制する。ねじ132は、先端部本体48に形成されたねじ孔130に螺入されている。ねじ孔130は、装着孔82から先端部本体48の外面48Bにかけて形成されている。【選択図】図6
