A one-touch clamping device having a novel configuration is proposed. SOLUTION: A pressing piece portion 11 on which a first protruding portion 21 is protruded, a base portion 12 on which a second protruding portion 22 is protruded, and a first connecting portion that connects the pressing piece portion 11 and the base portion 12. 14 and a pressing piece 11, a tube displacement prevention portion 23 for restricting the displacement of the tube in the left-right direction facing the left and right side surfaces of the tube, and the tube is inserted and clamped when opened. In this case, the one-touch clamp device that clamps the tube between the first protrusion 21 and the second protrusion 22 and closes the flow path of the tube by pressing the pressing piece 11 and bending the first connecting portion 14. 1 and at least two projecting portions 23b that are opposed to each other are provided in the tube displacement preventing portion 23, and the two projecting portions 23b can be disposed on both the left and right sides of the tube when opened. [Selection] Figure 1【課題】新規な構成のワンタッチクランプ装置を提案する。【解決手段】 第一突起部２１が突設される押圧片部１１と、第二突起部２２が突設されるベース部１２と、押圧片部１１とベース部１２を接続する第一接続部１４と、押圧片部１１に設けられ、チューブの左右の側面に対向してチューブの左右方向のずれを規制するためのチューブずれ防止部２３と、開放時においてチューブが挿通されるとともに、クランプする際には押圧片部１１を押圧し第一接続部１４を撓ませることで、第一突起部２１と第二突起部２２の間でチューブをクランプしてチューブの流路を閉塞するワンタッチクランプ装置１であって、チューブずれ防止部２３には対向する少なくとも二つの突出部２３ｂが設けられ、二つの突出部２３ｂは、開放時においてチューブの左右両側に配置され得る構成とする。【選択図】図１
