A hemostatic aid and a hemostatic method capable of appropriately applying a compressive force to a puncture site formed in a radial artery of an artery running on the back side of a hand are provided. A hemostasis assisting device 100 according to the present invention includes a mounting portion 10 that can be mounted at least on a thumb and an index finger of a hand of a patient H, and a state in which the thumb and the index finger mounted with the mounting portion are in contact on one plane. And a holding unit 20 for holding. Thus, the first dorsal skeletal muscle between the thumb and the forefinger is raised, and the distal radial artery is compressed, so that the puncture site P is compressed and stopped. [Selection diagram] Fig. 1【課題】手の甲側を走行する動脈の橈骨動脈に形成した穿刺部位に適切に圧迫力を付与することが可能な止血補助具及び止血方法を提供する。【解決手段】本発明に係る止血補助具１００は、患者Ｈの手の親指と人差し指に少なくとも装着可能な装着部１０と、装着部を装着した親指と人差し指を一の平面上において接触した状態に保持する保持部２０と、を有する。これにより親指と人差し指の間の第１背側骨格筋を盛り上げて、遠位橈骨動脈を圧迫することで、穿刺部位Ｐを圧迫止血する。【選択図】図１
