PROBLEM TO BE SOLVED: To solve the problem that though an endoscope inserted into a body is washed by a washing machine for sterilization, dirt such as filth between an operation part and a drive knob can hardly be removed, and also the problem that the operation part is so heavy that the operating hand gets tired.SOLUTION: Since a drive knob part of an endoscope operation part can be easily attached and removed, an appropriate knob can be selected while a usually performed endoscope operation method is maintained. An endoscope, not only can be washed by a washing machine in a conventional manner, but also can be washed even with the drive knob removed, thereby enabling excellent washing.SELECTED DRAWING: Figure 1COPYRIGHT: (C)2016,JPO&INPIT【課題】体内に挿入される内視鏡は、滅菌のため洗浄機により洗浄されるが、操作部と駆動つまみの間の汚物等の汚れは落ちにくい。また操作部は重く操作の手が疲れる。 【解決手段】 本発明によれば、内視鏡操作部の駆動つまみ部が容易に着脱できるので、通常行われている内視鏡の操作法を保ったままで、適切なつまみが選択出来る。また従来通りの方法での洗浄機による洗浄が出来るだけでなく、駆動つまみを取り外した状態でも、洗浄が出来ることで良好な洗浄が可能となる。【選択図】図1