The medical device includes a first gripping member and the second gripping members toward and away from each other, a fixed rotatably mounted rotating body to the rotational axis relative to the first gripping member, the first end wherein the first pivot shaft provided on the second gripping member is rotatably connected to pivot to a second rotation axis which second end is arranged spaced apart from the said rotary shaft to said rotating body further comprising enabling a linked closing links, an operating member for rotating the rotating body, and when rotating the rotating member in a predetermined direction and connecting the axial line of the rotary shaft and the first pivot axis Virtual While approaching the second pivot axis in a straight line, and the first gripping member and the second gripping member approaches.この医療機器は、互いに接近離間する第一把持部材および第二把持部材と、前記第一把持部材に対して固定された回転軸に回転可能に取り付けられた回転体と、第一の端部が前記第二把持部材に設けられた第一回動軸に回動可能に連結され、第二の端部が前記回転体に前記回転軸と離間して設けられた第二回動軸に回動可能に連結された開閉リンクと、前記回転体を回転させる操作部材と、を備え、前記回転体を所定の方向に回転させると、前記回転軸と前記第一回動軸の軸線とを結ぶ仮想直線に前記第二回動軸が接近しながら、前記第一把持部材と前記第二把持部材とが接近する。
