A hemostatic device includes a band for being wrapped around a wrist W, securing means for securing the band in a state where the band is wrapped around the wrist, and an inflation portion disposed on an inner peripheral surface of the band, and that is inflated by injecting gas. The inflation portion has a first layer and a second layer which covers an outer surface of the first layer. The first layer is formed of a material which has a larger gas permeation amount per unit area than a material for forming the second layer. The second layer has gap portions which can expose the outer surface of the first layer outward from the second layer in a state where the inflation portion is inflated.
