This endoscope is equipped with: an operation unit provided to the proximal end side of an insertion part a pull member for bending a bend part by a relative motion, the pull member extending from a bend piece of the bend part and leading to the inside of the operation unit a pulley rotated in the pull direction of the pull member by a motor provided to the inside of the operation unit a rotator arranged so as to freely fit on the pulley, the pull member being arranged wound about the outer peripheral surface thereof so as to be elastically deformable an operator which protrudes from the operation unit and can be tilted and operated a lifting frame which is provided to a shank of the operator and has, at mutually facing positions sandwiching the operator, attachment parts to which the pull member guided into the operation unit is fixedly provided and a force amount adjustment unit for altering the frictional resistance generated by tilting and operating the operator to pull the pull member, reducing the diameter of the rotator and contacting the inner peripheral surface thereof against the outer peripheral surface of the pulley, and for adjusting the amount of force pulling on the pull member closer to the insertion part side than the pulley.Linvention concerne un endoscope qui comporte : une unité de fonctionnement disposé sur le côté dextrémité proximale dune partie dintroduction un élément de traction pour courber une partie incurvée par un mouvement relatif, lélément de traction sétendant à partir dune pièce incurvée de la partie incurvée et conduisant à lintérieur de lunité de fonctionnement une poulie mise en rotation dans la direction de traction de lélément de traction par un moteur disposé à lintérieur de lunité de fonctionnement un rotateur disposé de façon à sadapter librement sur la poulie, lélément de traction étant disposé de façon à entourer la surface périphérique externe de celle-ci de façon à pouvoir être déformée élastiquement un opérateur qui
