PROBLEM TO BE SOLVED: To provide a tourniquet device capable of keeping strength of an expansion part excellent, and easily adjusting discharge speed of gas.SOLUTION: A tourniquet device 10 includes: a belt body 20 to be wound around a puncture site P of a wrist W； fixation means 30 for fixing the belt body in a state in which the belt body is wound around the wrist； and an expansion part 40 that is connected to the belt body and expands by being injected with gas. The expansion part comprises: a first area A1 that extends when the expansion part is injected with gas； and a second area A2 that is harder to extend than the first area and is made from hard material, the second area including a micro hole 51 that discharges gas inside the expansion part in a state in which the expansion part expands.SELECTED DRAWING: Figure 2COPYRIGHT: (C)2018,JPO&INPIT【課題】拡張部の強度を良好に保つことができ、かつ、気体の排出速度を容易に調整することが可能な止血器具を提供する。【解決手段】止血器具１０は、手首Ｗの穿刺部位Ｐに巻き付けるための帯体２０と、帯体を手首に巻き付けた状態で固定する固定手段３０と、帯体に連結され、かつ、気体を注入することにより拡張する拡張部４０と、を有し、拡張部は、当該拡張部に気体を注入する際に伸長する第１領域Ａ１と、当該第１領域よりも伸長し難く、かつ、硬質な材料で形成された第２領域Ａ２と、を備え、第２領域は、拡張部が拡張した状態で、拡張部内の気体を経時的に排出する微小孔５１を有する。【選択図】図２
