Aim: Endometriosis is a disease affecting women of fertile age, with an estimated more than 176 million women worldwide suffering from their symptoms, with no correlation between the degree and symptoms of the disease. Although the initial treatment in endometriosis is medical treatment, patients with severe symptoms are candidates for surgery as the last choice. We contribute to the literature by publishing our 15 cases and to discuss surgical treatment methods. Method: Patients operated due to the endometriozis in Kartal Dr Lutfı Kırdar Training and Research Hospital between January, 2019 and January, 2020 were evaluated. 15 patients were found according to the criteria. and discussed according to the literature. All patients’ age, body mass index, gravida, parity, medications, chronic diseases,, past surgical history, duration of diagnosis time, ultrasonograph results, clinical symptoms, physical examinations,surgical procedure, operation time, complications, hospital discharge time, preoperative and postoperative pain scores [10-cm visual analogue scale (VAS)] were analyzed Results: When the postoperative VAS scores were evaluated, it was found that the scores improved significantly compared to preoperative VAS scores. Intraoperatively, ureter damage in one patient and bowel damage in one patient were detected. Wound infection was detected as a postoperative complication in one patient. Conclusion: Operations performed by experienced teams in cases resistant to medical treatment in endometriosis benefit the patient, as well as operations performed by inexperienced hands may harm the patient. Therefore, we think that patients who need endometriosis surgery should be directed to experienced centers.