PROBLEM TO BE SOLVED: To provide a tube holder that can hold tubular items of various size from a small diameter to a large diameter in a medical field.SOLUTION: A tube holder has at least one set of clamping members each having a circular arc-shaped clamping recess, a support shaft for supporting ends along the circular arc of these clamping members together in a freely turning manner while the clamping recesses facing the curvature center side of each circular arc are opposed to each other, a biasing member for turning and biasing other ends along the circular arc of the clamping members in the direction coming close to each other. The clamping members are configured such that an inscribing circle formed between the facing surfaces of the clamping recesses is smaller than a virtual circle formed by extending the arc of these clamping recesses while the other ends are closed, and also the clamping recesses are arranged on the same virtual circle formed by extending the arc in the middle of opening and closing the clamping members when being turned and the other ends are approached or separated to each other.SELECTED DRAWING: Figure 1【課題】、医療現場において小径から大径までの様々なサイズの管状アイテムを保持することができるチューブホルダを提供する。【解決手段】円弧状の挟持凹部を有する少なくとも一組の挟持部材と、これら挟持部材の円弧に沿う一方の端部同士をそれぞれの円弧の曲率中心側に面した挟持凹部が対向した状態で回動自在に支持する支軸と、挟持部材の円弧に沿う他方の端部を相互に接近する方向に回動付勢する付勢部材とを有し、挟持部材は、他方の端部間が閉じた状態では、挟持凹部の対向面間で形成される内接円がこれら挟持凹部の円弧を延長して形成される仮想円より小さく、かつ、挟持部材を回動して他方の端部を接近離間する開閉途中の状態で、挟持凹部が、その円弧を延長して形成される同一の仮想円上に配置される。【選択図】 図１
