PROBLEM TO BE SOLVED: To provide an endoscope capable of performing endoscopic observation while preventing an illumination light from being blocked by an insertion pipe when switching an observation state by rotating a unit having an objective optical system and an illumination optical system.SOLUTION: An endoscope includes: an operation part 3 a tubular pipe member 2P inserted into a subject disposed on a tip side of the operation part 3 a transparent dome 11 disposed on a tip side of the pipe member 2P, which transmits a light a transparent pipe 21 disposed between the transparent dome 11 and the pipe member 2P, which transmits a light an imaging part 50 disposed inside the transparent dome 11 or the transparent pipe 21, which is rotatable around the axis, and whose observation area OA is set so as to move in a transmission area of at least the transparent dome 11 by rotation and an illumination part 40 disposed inside the transparent dome 11 or the transparent pipe 21 so as to move in conjunction with the imaging part 50, whose illumination light irradiation area IA is set so as to move in a combined transmission area of the transparent dome 11 and the transparent pipe 21.SELECTED DRAWING: Figure 12BCOPYRIGHT: (C)2018,JPO&INPIT【課題】対物光学系と照明光学系とを有するユニットを回動させて観察状態を切り換えた際に照明光が挿入パイプによって遮断されることなく内視鏡観察を行える内視鏡を提供する。【解決手段】操作部3と、操作部3の先端側に配設された被検体に挿入される管状のパイプ部材2Pと、パイプ部材2Pの先端側に設けられた光を透過する透明ドーム11と、透明ドーム11とパイプ部材2Pとの間に設けられた光を透過する透明パイプ21と、透明ドーム11または透明パイプ21の内部に配設され、軸周りにそれぞれ回動自在であって、回動によって観察領域OAが少なくとも透明ドーム11の透過範囲内を移動するように設定された撮像部50と、撮像部50に連動して移動するように透明ドーム11または透明パイプ21の内部に配設され、照明光照射領域IAが透明ドーム11と透明パイプ21とを合わせた透過範囲内を移動するように設定された照明部40と、を具備する。【選択図】図12B
