A medical treatment endoscope includes: a flexible sheath capable of a bending operation a viewing unit for observing the vicinity of the tip relative to the sheath an arm section protruding from the tip of the sheath and capable of bending operation an operation section for operating the arm section and at least a transmission member, connected to the arm section and the operation section, for transmitting the operation of the operation section to the arm section. The transmission member is detachably connected to the operation section.
