A surgical device is an actuator suitable for coupling to the sleeve (5) of an endostaple with an actuator for a tightening channel (1) and a tightening anvil (2). The tightening channel (1) includes a cartridge (3) with a knife (4) and with at least one line of pushers (8) for the staples on each side of the knife (4). The anvil (2) includes a slot (6) for the knife (4) and at least one line of alveoli (7) on each side of the knife (4), the lines of alveoli (7) corresponding with the lines of pushers (8) for the staples. The number of lines of pushers (8) and the number of lines of alveoli (7) for the staples is different on each side of the knife (4) and the slot (6) respectively.
