Disclosed is a transmission assembly (2) for a reusable endoscopic cutter stapler gun body. The transmission assembly is suitable for a reusable intracavitary cutter stapler matched gun body for applying a suture row to an intracavitary tissue. The transmission assembly (2) comprises a connecting rod sleeve (2-1), a fixing rod (2-2), a steering rear pull rod (2-3), a hit push rod (2-4), a withdrawal pull rod (2-5), a withdrawal pull piece (2-6), a withdrawal pull rod block (2-7), a lower rotatory fixation handle (2-8), a support block (2-9), a rotary fixation block (2-10), an inner retainer (2-11), a rotary positioning cover (2-12), a lower rotary pressing piece (2-13), an upper rotary pressing piece (2-14), a rotary handle spring (2-15), a rotary cover (2-16), a rotary handle (2-17), an upper rotary fixation handle (2-18), a fixing retainer (2-19) and a sliding block (2-20). A reusable endoscopic cutter stapler gun body can be operated by one hand, such that an operation is more continuous, and a surgeon may take other instruments in his/her free hand, thereby reducing operation time and operation risk and relieving pain in a patient. The reusable endoscopic cutter stapler gun body is mounted with a replaceable cutting and stapling component after being sterilized, and is reusable, thus reducing operation costs and an economic burden of a patient.L'invention concerne un ensemble de transmission (2) pour un corps de pistolet d'agrafeuse coupante endoscopique réutilisable. L'ensemble de transmission est approprié pour un corps de pistolet apparié à une agrafeuse coupante intracavitaire réutilisable pour appliquer une rangée de sutures à un tissu intracavitaire. L'ensemble de transmission (2) comprend un manchon de tige de liaison (2-1), une tige de fixation (2-2), une tige de traction arrière de direction (2-3), une tige de poussée de frappe (2-4), une tige de traction de retrait (2-5), une tirette de retrait (2-6), un bloc de tige de traction de retrait (2-7), une p
