A series of 243 cases with koilocytotic atypia of the uterine cervix is reported. They were screened out from 597 cases of the cervical histologic specimen performed between autumn 1976 and summer 1977. 162 cases of minimal, 60 cases of moderate, and 21 cases of marked grade according to Koss were found. 123 patients of 243 women with koilocytotic atypia were found from our population screening programms. We found 34 patients with koilocytotic atypia in the patients of C. I. S. who were operated on recently. In 28 stage Ia patients we fond 12 koilocytotic patients, and 8 cases in stage 19 stage Ib patients. None of them in stage II. The most of these koilocytotic changes had passed unnoticed or were labeled chronic cervicitis. From the standpoint of morphologic features, we interprete as follows, the koilocytotic atypia is the same lesion to the flat type of the condylomatotis lesion of the cervix uteri (A. Meisels).