Reliable preoperative staging of cervical cancer is important to evaluate and compare the results of different therapeutic modalities, including, surgical treatment, chemotherapy and radiation therapy. The diagnostic reliability of preoperative staging of cervical cancer by cervical biopsy and endocervical curettage was evaluated by a retrospective diagnostic study. The results of this preoperative staging were compared with the stage of cancer set on the basis of histopathological examination of the samples. Only patients who were clinically staged as early (operable) to the disease stage were included in the study. Postoperative diagnosis in 98 patients was exocervical cancer, in 12 endocervical cancer in 5 it was H-SIL (CIN III), and in 4 patients it was chronic cervicitis. The diagnostic reliability of preoperative staging of cervical cancer by cervical biopsy and endocervical curettage was 76.9%. In order to reduce errors in the staging of cervical cancer, it is advised that it be performed in specialized cancer centers by an experienced oncology gynecologist.