Endoscopic Surgical Instrument

An endoscopic surgical instrument comprising:

• an insertion section configured to receive an endoscope inserted therein and to be inserted into a body cavity, the insertion section comprising a tip end part, a base end part, and a longitudinal central axis extending from the tip end part to the base end part in a longitudinal direction;
• a grip section provided to be linked with the base end part of the insertion section;
• a wiper axis member comprising a first end part and a second end part, extending from the first end part to the second end part along the longitudinal direction of the longitudinal central axis, provided inside the insertion section, and rotatable around a central axis of the wiper axis member;
• a wiping section that is coupled to the second end part of the wiper axis member, is provided at the tip end part of the insertion section, is pivoted by the wiper axis member to rotate, and is pivoted to wipe off extraneous matter adhering to an observation surface provided at a tip part of a lens of the endoscope;
• arm parts provided in the grip section, protruding from an outer face of the grip section and pressed toward the longitudinal central axis in a radial direction of the grip section;
• and
• a rotatable unit provided in the grip section to rotate the wiper axis member by the arm parts.