Three cases of rectal stricture, 47 aged male, 52 aged female and 40 aged male, were diagnosed as rectal carcinoma. One stage abdomino-perineal resection was done in one case and two stage operation in others. Their histologic findings showed nonspecific chronic inflammation and there were no malignancies. Differentiation from ulcerative colitis or venereal lymphogranuloma could not be cleared because of some erosion of mucous membrane, fibric hyperplasia of the wall and infiltration of small round cells and no performance of Frei test.