According to an embodiment of the present invention, the anastomosis ring having an opening through which the tubular organ passes, the anastomosis ring fixed to one end of the tubular organ is formed on one side, the first fixing part which can be fixed to the clamp of the anastomosis mechanism; A second fixing part formed adjacent to the one side and fixed to the clamp; And fixing pins installed along the circumference of the opening, wherein the first fixing part and the second fixing part are rotationally symmetrical by a predetermined angle with respect to the center of the anastomosis ring, and the anastomosis ring includes the first and second fixing parts. It is fixed to the clamp by any one of the second fixing part.
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