PROBLEM TO BE SOLVED: To provide a medical tool excellent in suction performance and suction efficiency.SOLUTION: A medical tool is for insertion into a body cavity and comprises: a tubular insertion part having a suction hole; a tubular gripping part having an exhaust hole; a suction passage between the suction hole and the exhaust hole; and a suction switch which is provided between the insertion part and the gripping part, and opens and closes the suction passage. An inner diameter over an entire length of the suction passage is equal to or greater than an inner diameter of the suction hole, and the inner diameter of the suction hole is 3 mm or greater.SELECTED DRAWING: Figure 1COPYRIGHT: (C)2020,JPO&INPIT【課題】吸引性能および吸引効率に優れた医療器具を提供する。【解決手段】医療器具は、体腔内に挿入される医療器具であって、吸引口を有する管状の挿入部と、排出口を有する管状の把持部と、前記吸引口と前記排出口の間の吸引通路と、前記挿入部と前記把持部の間に設けられ、前記吸引通路を開閉する吸引スイッチと、を備えている。この医療器具において、前記吸引通路の全長に亘る内径は、少なくとも前記吸引口の内径以上であり、前記吸引口の内径は、3mm以上である。【選択図】図1