Patent ID: 7918785

Claim:
A medical device comprising: a tubular insertion portion; a function portion disposed closer to a distal end side than a distal end surface of the insertion portion; a turning force transmitting member for turning the function portion by a turning operation, the turning force transmitting member being inserted in the insertion portion and turnable in a circumferential direction in the insertion portion; an operation portion to be operated to turn the turning force transmitting member; and a turn restricting mechanism portion for restricting a turn position of the function portion turned by a turning force transmitted by the turning force transmitting member with respect to the insertion portion at a first turn-restricting position and at a second turn-restricting position turned by a predetermined angle from the first turn-restricting position, wherein the turn restricting mechanism portion includes: a turn restricting member integrally provided to the insertion portion and having a restricting surface in a circumferential direction; a stopper member provided near the function portion or to the turning force transmitting member, the stopper member including a contact surface which is contactable to and separatable from a restricting surface of the turn restricting member; and a stopper turning space which allows the stopper member to turn about an axis direction, the stopper member being formed in a circumferential direction about the axis direction, and wherein the turn restricting mechanism portion further includes a state where turning of the function portion with respect to the insertion portion is restricted at the first turn-restricting position or the second turn-restricting position by contact between the restricting surface and the contact surface, and a state where the function portion is turnable with respect to the insertion portion by separating the restricting surface and the contact surface in the circumferential direction in the stopper turning space.