To provide an instrument fixing device for fixing a surgical treatment instrument such as a cerebral vertebra, an endoscope or the like to be used for performing a surgical operation, a bellows for flexibly fixing an operation therapeutic instrument fixed to an attachment , And when loosening the wire in order to change the shape of the bellows, the joint coma is obtained so that each joint piece does not couple with each other and the shape change can be performed smoothly.SOLUTION: The spherical circular spherical portion whose upper portion is slightly cut horizontally and the column portion is provided at the lower portion of the spherical portion, and inside the cylindrical portion, a circular ball of another joint piece A receiving groove for inserting the upper part of the part is formed into a hemispherical shape with the same diameter as that of the circular spherical part and an insertion hole for connecting a large number of articulated pieces through a wire is formed by cutting.BACKGROUND OF THE INVENTION【課題】外科手術を行なう際に使用する脳ベラや内視鏡等の手術用治療器具を固定するための器具固定装置において、アタッチメントに固定した手術用治療器具を屈曲自在に固定するための蛇腹を構成する関節コマの保持力を増強させると共に、蛇腹の形状を変えるためにワイヤーを緩め際には、各関節コマが互いに結合することもなく形状変更がスムーズに行える関節コマを得る。【解決手段】上部を水平に僅かに切削した球状の円球部と、該円球部の下部に円柱部を設けた形状を成し、該円柱部の内部には別の関節コマの円球部の上部を挿入するための受け溝を前記円球部と同一直径で半球状に削成すると共に、ワイヤーを通して多数の関節コマを連接するための挿通穴を削成して構成する。【選択図】図1
