The object of the invention is a disposable connecting unit of a circular stapler comprising a load, which is mounted on a body with a load nut constituting the proximal end of the outer load sleeve connected to the load housing comprising in the upper part a ring with a circular knife supported on the load impactor and an anvil, wherein the anvil is concentrically placed on the needle passing through the inner load sleeve, characterised in that on the outer surface of the inner sleeve there is positioned a load spring withdrawing the circular knife, which extends between the distal end of the load impactor and a flange of the inner load sleeve. The invention also relates to a circular stapler for connecting tissue fragments, comprising a shared disposable connecting unit.
