PROBLEM TO BE SOLVED: To provide an endoscope tip portion unit capable of replacing a damaged tip lens without removing the imaging unit from the insertion portion. SOLUTION: An endoscope tip unit 20 has a tip rigid portion 30 constituting a tip 4 of an endoscope 1 and a first opening 31 m on the tip surface 30f side of the tip rigid portion 30. The through hole 31 and the second through hole 32 having a second opening 32 m on the tip surface 30f side, and the first opening 31 m can be inserted and removed from the first opening 31 m side into the first through hole 31. The lens frame 40 that holds the lens 4a that is inserted into the first through hole 31 and whose end protrudes into the internal space 35 of the tip rigid portion 30 from the opening 31r on the opposite side, and the light that has passed through the lens 4a. A sensor frame 50 slidably arranged in the lens frame 40, which holds an image sensor 56 that receives light and performs photoelectric conversion, and a sensor frame 50 that is slidably arranged in a second through hole 32, are slidably arranged. It is provided with an adjusting member 70 for adjusting the position of the sensor frame 50 in the optical axis direction. [Selection diagram] FIG. 9C【課題】撮像ユニットを挿入部内から抜去すること無く、破損した先端レンズの交換が可能な内視鏡先端部ユニットを提供する。【解決手段】内視鏡先端部ユニット２０は、内視鏡１の先端部４を構成する先端硬性部３０と、先端硬性部３０の先端面３０ｆ側に第１の開口３１ｍを有する第１の貫通孔３１と、先端面３０ｆ側に第２の開口３２ｍを有する第２の貫通孔３２と、第１の開口３１ｍ側から第１の貫通孔３１内への挿抜が可能で第１の開口３１ｍから第１の貫通孔３１内に挿入されて反対側の開口３１ｒから先端硬性部３０の内部空間３５内に端部が突出するレンズ４ａを保持するレンズ枠４０と、レンズ４ａを通過した光を受光して光電変換を行うイメージセンサ５６を保持する、レンズ枠４０に摺動自在に配置されるセンサ枠５０と、第２の貫通孔３２内に回動自在に配置されて、摺動に伴ってセンサ枠５０の光軸方向の位置を調整する調整部材７０と、を具備する。【選択図】図９Ｃ
