Abstract Aim of the study: the evaluation of influence of abnormal vaginal biocoenosis on presence and maintenance ASC and AGC in Pap smears. Methods: The study group consisted of 242 non-pregnant women (25-65 years of age): 207 women (4.96%) with atypical sqamous cells and 35 (0.7%) with atypical glandular cells. In all women the vaginal flora was assessed by Nugent scale. Results: Vaginal flora was normal in 157 (75.8%) and pathological in 50 (24.1%) women with ASC. In the ASC subgroup, the highest proportion of physiological vaginal flora was observed in 151 patients (77.4%) with ASC-US, in comparison to 44 (22.6%) with ASC-H, in which the percentage of women with normal or abnormal flora was the same (50%vs 50%). This difference was statistically significant. In case of AGC, vaginal culture was physiological in 23 (65.7%) women, and in 12 (34.3%) abnormal vaginal flora with features of the inflammation. The statistically significant influence of abnormal vaginal flora on the presence of atypical endometrial and endocervical cells was not observed. Conclusions: We did not observed any influence of abnormal vaginal flora on the presence, regression and progression of ASC and AGC .