PROBLEM TO BE SOLVED: To provide a compact driving member for operating a medical treatment instrument, a drive mechanism equipped with the driving member, and a manufacturing method for the drive mechanism.SOLUTION: A driving member which is rotatably provided around a rotary shaft in a housing and an elongate element for operating a treatment instrument is wound around includes: a plurality of rotary members rotating around the rotary shaft； and a pressing member engaged with at least one of the plurality of rotary members. The respective plurality of rotary members include surfaces where unevenness is formed. The plurality of rotary members are fitted to a base body of the housing in the state that respective surfaces are engaged with one another by receiving pressure by the pressing member in the direction in which the rotary shaft extends.SELECTED DRAWING: Figure 7【課題】医療用処置具を操作するための小型の駆動部材、当該駆動部材を備える駆動機構、および当該駆動機構の製造方法を提供する。【解決手段】駆動部材は、ハウジング内において回転軸を中心に回転可能に設けられ、処置具を操作するための細長要素が巻かれる駆動部材であって、前記回転軸を中心に回転する複数の回転部材と、前記複数の回転部材のうちの少なくとも１つと係合する押圧部材とを備え、前記複数の回転部材の各々は、凹凸が形成された面を含み、前記複数の回転部材は、前記押圧部材による前記回転軸の延びる方向への押圧を受けることにより、各々の前記面同士が係合した状態で、前記ハウジングの基体に取り付けられる。【選択図】図７
