Patent ID: 8308744

Claim:
An endoscopic treatment instrument comprising: an insertion portion comprising a distal end and a proximal end, the distal end being adapted to be inserted into a human body; a treatment portion disposed to the distal end; and a control portion disposed to the proximal end, wherein the treatment portion comprises: an extendable and retractable input member operated by the control portion; a first link disconnectably connected to the input member through a first connecting portion; a first control plate disposed in the first connecting portion, the input member inserted through the first control plate, and the first control plate being configured to engage the input member by inclination of the first control plate; a first forceps member capable of opening and closing according to advancing and retracting motions of the first link; a second link disconnectably connected to the input member through a second connecting portion; a second control plate disposed in the second connecting portion, the input member inserted through the second control plate, and the second control plate being configured to engage the input member by inclination of the second control plate; and a second forceps member capable of opening and closing according to advancing and retracting motions of the second link, and having an opening-and-closing angle which is lower than an opening and closing angle of the first forceps member, wherein the second connecting portion makes the connection between the input member and the second link according to an inclination motion of the second control plate until the second forceps member is opened by a predetermined degree of opening.