Patent ID: 7942815

Claim:
An endoscope insertion portion comprising: an insertion tube portion including a distal end portion and a proximal end portion; a bending portion including a middle portion and a proximal end portion connected to the distal end portion of the insertion tube portion; a first operation wire inserted through the bending portion and insertion tube portion, and configured to be operated to be moved forward and backward to operate the bending portion to be bent in a first direction; a second operation wire inserted through the bending portion and insertion tube portion, arranged opposite to the first operation wire, and configured to be operated to be moved forward and backward to operate the bending portion to be bent in a second direction opposite to the first direction; a distal end side wire guide provided over a distal end side of the first operation wire, including a distal end portion fixed to the middle portion of the bending portion and a proximal end portion, and extending from the middle portion of the bending portion to the proximal end portion of the bending portion; a proximal end side wire guide provided over a proximal end side of the first operation wire, including a distal end portion fixed to the distal end portion of the insertion tube portion, and extending from the distal end portion of the insertion tube portion toward the proximal end portion of the insertion tube portion; a distal end side abutting portion provided at the proximal end portion of the distal end side wire guide; and a proximal end side abutting portion provided at the distal end portion of the proximal end side wire guide, and configured to be brought into abutment with the distal end side abutting portion when the first operation wire is moved backward so that the bending portion is bent.