The guide wire gripper includes a sheath, a linear member extending along the longitudinal axis of the sheath, an operation unit that moves the linear member along the longitudinal axis, a distal end, a proximal end, and a pair of side ends. And a support member connected to the linear member and fixed to one of the pair of side ends. The clearance between the contact surface and the outer peripheral surface of the distal end portion of the sheath is such that the guide wire is accommodated in the clearance from the other of the pair of side ends, or the guide wire is released from the clearance. Is opened at the other end of the pair of side ends, and the gripping member is moved to a position facing the outer peripheral surface in accordance with the movement of the linear member and the support portion, thereby being arranged in the gap. The guide wire is gripped between the contact surface and the outer peripheral surface.このガイドワイヤ把持具は、シースと、シースの長手軸に沿って延びる線状部材と、線状部材を長手軸に沿って移動させる操作部と、先端、基端、及び一対の側端によって周縁が囲まれた当接面を有する把持部材と、線状部材に連結され、一対の側端の一方に固定された支持部と、を備える。当接面とシースの先端部の外周面との隙間は、一対の側端の他方からその隙間にガイドワイヤが収容される、または、その隙間からガイドワイヤが解放されるように、当接面の先端、基端、及び一対の側端の他方で開放されており、線状部材及び支持部の移動に応じて、把持部材を外周面に対向する位置に移動させることによって、その隙間に配されたガイドワイヤを当接面と外周面との間で把持する。
