Patent ID: 8777839

Claim:
A medical instrument comprising: a tubular inserting portion extending along a longitudinal axis and having a tubular bending operation portion which is bendable; and a wire member disposed in the inserting portion along the longitudinal axis and which bends the bending operation portion in a predetermined direction by being moved toward the inserting portion; a manipulation portion to which a first end of the wire member is fixed and which moves the wire member by being operated; wherein the manipulation portion includes: a shaft portion around which a portion of the wire member is wound, a pair of faces provided to be separated in an axial direction of the shaft portion, and a wall portion which connects the pair of faces, a shock absorbing space, which communicates with an inside of the inserting portion, is defined by the pair of faces, the wall portion, and an outer peripheral surface of the shaft portion, a second end of the wire member is fixed to the bending operation portion, and when the bending operation portion is bent in the predetermined direction by an external force applied to the bending operation portion, a portion of the wire member is moved into the shock-absorbing space and makes a ring whose diameter is larger than a diameter of the shaft portion.