Patent ID: 8353815

Claim:
An instrument for an endoscope, the instrument comprising: an insertion portion having a distal end, a proximal end and a middle portion between the distal end and the proximal end, and configured to be insertable into a channel of the endoscope; a treatment portion configured to treat a target region, wherein the treatment portion is arranged substantially at the distal end of the insertion portion; an operation wire which is inserted into the insertion portion, and of which the distal end is connected to the treatment portion so as to operate the treatment portion; an operation portion which is disposed at the proximal end of the insertion portion, and which is connected to the proximal end of the operation wire so that the treatment portion is available to be operated by moving the operation wire back and forth; and a connecting portion which is configured to connect the operation portion to the middle portion of the insertion portion, wherein the connecting portion comprises: an engaged member which is disposed on the insertion portion; and a pushing member which is disposed at the operation portion, and which is configured to contact the engaged member in a longitudinal direction of the middle portion of the insertion portion in a state where the operation portion is connected to the middle portion of the insertion portion; wherein the pushing member pushes the engaged member while moving the operation portion in the longitudinal direction, and thereby the middle portion of the insertion portion is moved in the longitudinal direction with the pushing member.