PURPOSE: To enable the automatic and rapid carrying out of the incision treatment of an animal large intestine and prevent the large intestine from being caught in an apparatus.

CONSTITUTION: The apparatus for incising an animal large intestine is obtained by stretching a rotating transfer mechanism 4 over gears 6, 7 and 8, made of a synthetic resin and installed on the top surface of a guide rod 3 and a driving pulley 9 and a driven pulley 10 formed above the guide rod 3, constituting the mechanism of a transfer belt 11, made of a rubber and having formed unevennesses meshing with the respective gears 6, 7 and 8, installing the driving pulley 9 at a higher level than that of the driven pulley 10 and installing the transfer belt 11 tilted toward the upper rear of the guide rod 3, forming a protruding part 12, protruding from the guide rod 3 upward and having a slope (12a) in contact with the transfer belt 11.