Patent ID: 8562513

Claim:
An endoscope device comprising: an elongated tubular insertion part; a plurality of arm members provided in a distal portion of the insertion part so as to protrude forward, the plurality of arm members being capable of treatment with a treatment tool inserted thereinto; an observation cable comprising an energization member that is inserted into the insertion part and having a bending tendency, and an observation main body provided in the distal portion of the energization member, wherein the bending tendency of the energization member is capable of restoring to a bent shape in which the energization member bends so as to dispose the observation main body toward the direction opposite to the plurality of the arm members in the radial direction of the insertion part; and a holding-down member provided on an outer surface of the insertion part so as to freely move along a circumferential direction of the outer surface of the insertion part with respect to the insertion part, the holding-down member being configured to hold down the energization member in a radially inward direction of the insertion part so as to deform the bent shape of the energization member into a linear shape that is along a longitudinal axis of the insertion part; wherein by moving the holding-down member to a position other than the position where the holding-down member holds down the energization member in the radially inward direction of the insertion part, the energization member is capable of being restored to the bent shape in which the observation main body is disposed in a position separated from the insertion part in a radially outward direction while the plurality of arm members is kept within a observable range of view of the observation main body.