Provided is a medical instrument, comprising a gripper (3), an operating head (2) and a handle (1), wherein the operating head (2) is connected to the gripper (3) and the handle (1); the handle (1) comprises a housing (10); the operating head (2) comprises a triggering force applicator, a triggering rod (21) connected to the triggering force applicator, a placement cavity (22) arranged at one side of the triggering rod (21), and a clip cartridge assembly (23) arranged inside the placement cavity (22) and used for conveying a ligation clip (231) to the gripper (3); an inner cavity (11) in communication with the placement cavity (22) is formed inside the housing (10); and the triggering rod (21) is connected to the triggering force applicator and the gripper (3) respectively, and the triggering force applicator drives the triggering rod (21) to move so as to open or close the gripper (3). The medical instrument further comprises a limiting member for preventing the clip cartridge assembly (23) and/or a driving assembly (26) from exceeding a travel range. The medical instrument has an extremely large safety coefficient by means of providing limiting protection, effectively reduces the probability of failure in the case of a single fault, reduces the risk of an operation, has a simple structure and is easily operated.L'invention concerne un instrument médical, comprenant une pince (3), une tête d'actionnement (2) et une poignée (1), la tête d'actionnement (2) étant reliée à la pince (3) et à la poignée (1) ; la poignée (1) comprenant un boîtier (10) ; la tête d'actionnement (2) comprenant un applicateur de force de déclenchement, une tige de déclenchement (21) reliée à l'applicateur de force de déclenchement, une cavité de placement (22) disposée sur un côté de la tige de déclenchement (21), et un ensemble cartouche d'agrafes (23) disposée à l'intérieur de la cavité de placement (22) et utilisée pour transporter une agrafe de ligature (231) vers la pince (3) ; une cavit