Patent ID: 7341554

Claim:
An endoscopic treatment system comprising: a first insertion instrument; a second insertion instrument into which the first insertion instrument is inserted; an observation device included in either the first insertion instrument or the second insertion instrument and used to observe a living-body tissue; a clamping and lifting member that is included in the first insertion instrument and that has a clamping member which clamps the living-body tissue that is an object of treatment, and a lifting member which lifts the living-body tissue though bending; a tissue retainer member that is included in the second insertion instrument and that controls the lifting of a peripheral tissue of the living-body tissue clamped and lifted by the clamping and lifting member included in the first insertion instrument; a ligating member that ligates the living-body tissue; and a resecting member that resects the living-body tissue at a position between a region ligated by the ligating member and a region clamped by the clamping and lifting member; wherein the inserting sections of the first and second insertion instruments which are inserted into a living-body duct are formed with flexible members; the clamping member is a pair of clamp forceps that is inserted in a treatment instrument passage channel lying through the first insertion instrument; a lateral hole is formed in the lateral side on the outer periphery of the second insertion instrument; and a slit is formed in the lateral side on the outer periphery of the second insertion instrument opposing the lateral hole.