Abstract: An endoscope includes a flexible tube having a curved part at a tip and an endoscope main body part operating a curving operation on the curved part for work, the endoscope having a treatment tool insertion part for inserting a treatment tool projecting from the endoscope main body part and for use in a treatment of a subject into a treatment tool insertion tube arranged in the curved part along an axial direction, wherein the treatment tool insertion part includes an attachment and removal part having an insertion tube and a body, the insertion tube having one end inserted in the endoscope main body part to be arranged to communicate to the treatment tool insertion tube and another end placed outside the endoscope main body part, and the body holding and fixing the insertion tube to the endoscope main body part.

Abstract: An endoscope includes a flexible tube having a curved part at a tip and an endoscope main body part operating a curving operation on the curved part for work, the endoscope having a treatment tool insertion part for inserting a treatment tool projecting from the endoscope main body part and for use in a treatment of a subject into a treatment tool insertion tube arranged in the curved part along an axial direction, wherein the treatment tool insertion part includes an attachment and removal part having an insertion tube and a body, the insertion tube having one end inserted in the endoscope main body part to be arranged to communicate to the treatment tool insertion tube and another end placed outside the endoscope main body part, and the body holding and fixing the insertion tube to the endoscope main body part.

Abstract: To provide an endoscope operating apparatus where an operator who is a user can recognize a locked state and a free state clearly with his/her fingers grasping an operating part under an examining environment, and the number of constituent parts can be decreased to reduce a manufacturing cost and achieve weight reduction. An operating apparatus of an endoscope which is provided with a flexible tube inserted into a body to be examined and having a bending part at a distal end thereof and which performs work by bending the bending part according to a manual operation, comprising: a drive part which can pull a wire which is disposed in the flexible tube, a distal end of the wire being fixed to the bending part and the wire bending the bending part; and an operating part which operates the drive part.

Abstract: In a bending operation apparatus provided with pinions, and two pairs of rack members connected to two pair of operation wires arranged to extend up to a bending part, where operation wires are arranged in tubular covering members, bend-preventing members which cover the operation wires in an extendable and contractable manner in driving directions of the operation wires to prevent bends of the operation wires are provided between joint portions of the operation wires with the rack members and a covering member fixing part. Further, moving ranges of the rack members are set to be changeable. Furthermore, covering member holding parts are arranged on an inner peripheral face of a connection tube part of the bending operation apparatus.