A hemostatic device (10, 100, 200, 300) comprising: a band for wrapping around a site where bleeding is to be stopped of a limb; means for securing that secures the band to the limb in a wrapped state; an inflatable portion connected to the band and inflated by being injected with gas; a tube body that communicates between a lumen of the inflatable portion and an outside; whereby the hemostatic device (10, 100, 200, 300) further comprises: a cover portion that, inside the inflatable portion, covers the tube body, wherein the tube body has a hole portion that opens in the inflatable portion, the cover portion has a communication portion that is disposed to cover the hole portion and allows communication between the hole portion and the lumen of the inflatable portion by being positioned to overlap the hole portion, and the tube body is movable relative to the cover portion so that a positional relationship between the communication portion and the hole portion is controllable, wherein a lock mechanism (64, 82a, 82b) that restricts movement of the tube body relative to the cover portion is included, and wherein the lock mechanism (64, 82a, 82b) includes a first member disposed on the tube body and a second member (82a, 82b) provided on a support body disposed on a proximal side of the cover portion and configured to be engaged with and separated from the first member. a band for wrapping around a site where bleeding is to be stopped of a limb; means for securing that secures the band to the limb in a wrapped state; an inflatable portion connected to the band and inflated by being injected with gas; a tube body that communicates between a lumen of the inflatable portion and an outside; whereby the hemostatic device (10, 100, 200, 300) further comprises: a cover portion that, inside the inflatable portion, covers the tube body, wherein the tube body has a hole portion that opens in the inflatable portion, the cover portion has a communication portion that is disposed to cover the hole portion and allows communication between the hole portion and the lumen of the inflatable portion by being positioned to overlap the hole portion, and the tube body is movable relative to the cover portion so that a positional relationship between the communication portion and the hole portion is controllable, wherein a lock mechanism (64, 82a, 82b) that restricts movement of the tube body relative to the cover portion is included, and wherein the lock mechanism (64, 82a, 82b) includes a first member disposed on the tube body and a second member (82a, 82b) provided on a support body disposed on a proximal side of the cover portion and configured to be engaged with and separated from the first member. a cover portion that, inside the inflatable portion, covers the tube body, wherein the tube body has a hole portion that opens in the inflatable portion, the cover portion has a communication portion that is disposed to cover the hole portion and allows communication between the hole portion and the lumen of the inflatable portion by being positioned to overlap the hole portion, and the tube body is movable relative to the cover portion so that a positional relationship between the communication portion and the hole portion is controllable, wherein a lock mechanism (64, 82a, 82b) that restricts movement of the tube body relative to the cover portion is included, and wherein the lock mechanism (64, 82a, 82b) includes a first member disposed on the tube body and a second member (82a, 82b) provided on a support body disposed on a proximal side of the cover portion and configured to be engaged with and separated from the first member.