The detection of endometrial glands and endometrial stroma outside the uterus is called endometriosis. In our study, patients diagnosed with endometriosis after cesarean section, the effects of number of previous cesarean sections, endometriosis size, age and time after cesarean were investigated. Materials and methods: Patients who were operated in our clinic after cesarean between January 2012 and December 2018 and diagnosed as endometriosis were investigated retrospectively. The age, number of previous cesarean sections, time of diagnosis after a cesarean section and endometriosis dimensions of the patients were recorded. The patients were divided into Group 1 with 9 patients with a mass on the right side of the midline and group 2 with 12 patients on the left. Results: Between the two groups; there were no significant differences in terms of age, previous cesarean section numbers, time to cesarean diagnosis and endometriosis size (p=0.795, p=0.655, p=0.432, and p=0.434, respectively). Pain was present in 90% of the cases, and mass in 86%. The majority of cases were detected after the first cesarean section, namely on average 14.9±6.8 months. Conclusion: In the diagnosis of patients presented with pain and/or mass complaints in the sub-navel region after a cesarean section, the diagnosis of endometriosis should definitely be kept in mind. In our study, the cases of endometriosis were found more to the left of the midline however the diagnosis and treatment were the same.