Patent ID: 8512317

Claim:
A treatment apparatus comprising: a flexible tube section which has a longitudinal axis, and the flexible tube section being extended in longitudinal directions; a distal-end treatment section which is provided to a distal-end direction side of the flexible tube section, and the distal-end treatment section being rotatable in directions around the longitudinal axis with respect to the flexible tube section; a rotor which is provided between the distal-end treatment section and the flexible tube section, and the rotor being rotatable together with the distal-end treatment section in the directions around the longitudinal axis with respect to the flexible tube section; a rotational operation section which is provided to a proximal-end direction side of the flexible tube section, and the rotational operation section being configured to perform a rotational operation of the distal-end treatment section; a rotational operation wire which is extended on an outer peripheral surface of the rotor along a predetermined extending direction, and the rotational operation wire being configured to be pulled by the rotational operation section to apply force to the rotor in one of the directions around the longitudinal axis, the distal-end treatment section and the rotor being configured to rotate by the force applied in one of the directions around the longitudinal axis; a wire fixing portion which is provided to the rotor or to a part to the distal-end direction side of the rotor, and to which a distal end of the rotational operation wire is fixed; and a direction change portion which is configured to change an extending direction of the rotational operation wire, extended toward the outer peripheral surface of the rotor from the wire fixing portion, from the predetermined extending direction at apart to the proximal-end direction side of the rotor, and the direction change portion being configured to lead out the rotational operation wire, whose extending direction is changed from the predetermined extending direction, toward the rotational operation section.