Purpose of the investigation: To investigate the clinical importance of atypical glandular cells (AGC) on Pap Smear Test (PST). Materials and Methods: Clinical records of 74 patients that were detected with AGC were evaluated. Results: Of the 55 patients detected with AGC-not otherwise specific (AGC-NOS), 42 (76.3%) had negative histopathologic results, eight (14.5%) patients were detected with cervical squamous intraepithelial lesions, one (1.8%) patient was detected with squamous cell cervical cancer, three (5.4%) patients with endometrial hyperplasia, and one (1.8%) patient with endometrial cancer. Of the 19 patients detected with AGC-favor neoplasia (AGC-fn), seven (36.8%) patients had negative histopathologic results, five (26.3%) patients were presented with squamous intraepithelial lesions, one (5.2%) patient was detected with adenocarcinoma in situ, two (10.5%) patients with squamous cell cervical cancer, one patient had complex atypical endometrial hyperplasia, and one (5.8%) patient with endometrial cancer. The incidence of premalignant lesions in the patients with AGC-NOS and AGC-fn was 20% and 36% and the incidence of malignant lesions in the two groups was 3.6% and 26.3%, respectively. Conclusion: Patients detected with AGC on PST should be closely followed up and evaluated by using colposcopy and endocervical and endometrial curettage.