[Problem] To provide a hemostatic instrument in which the strength of an expansion part can be satisfactorily maintained, and with which the discharge rate of a gas can be easily adjusted. [Solution] A hemostatic instrument 10 comprising a band 20 for being wrapped around the wrist W, a fixing means 30 that fixes the band when the band has been wrapped around the wrist, an expansion part 40 that is connected to the band and that expands by gas being injected thereinto, and a filter member 70 that controls the discharge of the gas that has been injected into the expansion part, wherein the band has at least one hole part 24 that penetrates between the inner surface and the outer surface of the band, the expansion part is disposed so as to cover the hole part at the inner surface of the band, and the filter member is disposed on the band so as to block the hole part and inhibits the discharge of gas from the hole part.
