A hemostat comprises a compressing body (2) and a regulating component (3). The compressing body (2) is provided with an inner cavity (20) that is capable of containing liquid and the effective volume of which can be changed according to the amount of the liquid in the inner cavity (20). The regulating component (3) is provided with a liquid storage cavity (30) for containing liquid. The liquid storage cavity (30) is in communication with the inner cavity (20). The regulating component (3) is used for regulating the relative amount between liquid in the liquid storage cavity (30) and liquid in the inner cavity (20) so that the liquid can flow between the liquid storage cavity (30) and the inner cavity (20) and the pressure applied by the compressing body (2) can be changed. According to the provided hemostat, because the liquid is sealed between the two cavities (20, 30), a control valve is not needed to obtain the hemostat and an external liquid source is also not needed, so that the manufacturing cost and the using cost are effectively reduced, and the compressing force of the compressing body (2) can be regulated very conveniently. Because liquid serves as a working medium, the flow direction is easy to change, which facilitates space arrangement of the components in use locations and avoids a hidden danger caused by a collision between the regulating component (3) and another object the condition of a hemorrhagic spot can be seen very easily, and the hemostat has a good using effect and high reliability.Instrument dhémostase comprenant un corps de compression (2), contenant un corps liquide et modifiant efficacement le volume dune cavité (20) sous leffet de la quantité de liquide mise à disposition, ainsi quun organe de réglage (3) présentant un réservoir (30) recevant un liquide, lequel est en communication avec la chambre (20). Lorgane de réglage (3) est destiné à réguler la quantité de liquide entre le réservoir (30) et la cavité (20) de manière à permettre l
