The endoscope is equipped with: a curving manipulation unit provided on the main body manipulating unit, for performing a manual operation which causes the curving portion； a curving drive unit for coupling the curving manipulation unit to the curving portion so as to curve the curving portion in response to a manipulation performed by the curving manipulation unit； a manipulating force detecting unit for detecting a manipulating force applied to the curving manipulation unit； a manipulation assisting power calculating unit for calculating manipulation assisting power corresponding to the manipulating force detected by the manipulating force detecting unit； and a rotation driving force generating unit for applying a driving force via a driving force transferring mechanism to the curving drive unit, so as to generate the manipulation assisting power calculated by the manipulation assisting power calculating unit； in which the rotation driving force generating unit is arranged in an appendix unit.
