An object of the present invention is to provide an endoscope that can easily change the observation field of view with one operation member and always display the upper, lower, right and left directions of the display image and the observation direction even if the observation field of view is changed For this purpose, the endoscope includes an imaging unit 20 including the imaging device 21, an optical axis bending optical system that guides the light flux from the object to the imaging unit, a swingable operation input unit 3, an operation input unit An operation converting means 25 for decomposing the input of the motion converting means to generate a plurality of outputs, and motion transmitting means for transmitting the output of the motion converting means to the plurality of moving parts, the optical axis bending optical system is provided around the second optical axis O 2 A first prism 11 rotatably supported, and a second prism 12 rotatably supported around the third optical axis O 3, and the motion transmitting means rotatably supports the imaging section 20 An imaging unit interlocking means 22, and a first prism which is rotated about a second optical axis 1 and a prism rotation transmitting means comprising second transmission member 24 which rotates the transmission member 23 and the second prism to the third around the optical axis integrally with the first prism.本発明は、1つの操作部材で観察視野を容易に変更でき観察視野の変更を行っても表示画像の上下左右方向と観察方向とを常に一致させて表示する内視鏡を提供することを目的とし、そのために、内視鏡は、撮像素子21を含む撮像部20と、対象物からの光束を撮像部へ導く光軸屈曲光学系と、揺動可能な操作入力手段3と、操作入力手段の入力を分解し複数の出力を生成する動作変換手段25と、動作変換手段の出力を複数の可動部へ伝達する動作伝達手段とを備え、光軸屈曲光学系は第2光軸O2周りに回動自在に支持される第1プリズム11と、第3光軸O3周りに回動自在に支持される第2プリズム12とを有し、動作伝達手段は撮像部20を回動自在に支持する撮像部連動手段22と、第1プリズムを第2光軸周りに回転させる第1伝達部材23及び第2プリズムを第1プリズムと一体に第3光軸周りに回転させる第2伝達部材24からなるプリズム回転伝達手段とを有する。
