Proctoscope being convenient to measure inside diameter

The utility model discloses a proctoscope facilitating inside diameter measuring, belonging to the medical appliance. The structure of the utility model comprises a proctoscope tub e and a core inserted in the proctoscope tube. The utility model is characterized in that the proctoscope is cone-shaped and scales for displaying the inside diameter and / or perimeter of the rectum is carved on the outer wall of the proctoscope tube. Compared with the prior art, the proctoscope of the utility model which is characterized by convenient operation and providing accurate data for the doctor to diagnose can be widely applied in the diagnosis and the treatment of anal and rectal diseases.