Background: Uterine inversion is a very rare pathologi cal condition that usually occurs in puerperium. Non- puerperal uterine inversion is exceptional and to our knowledge only a few cases of uterine inversion due to a uterine sarcoma have been reported. Case Report: A 79-year-old woman, gravida 0, para 0, presented with vaginal bleeding. Pelvic examination under anesthesia revealed a huge mass coming from the cervix filling the vagina to the introitus, and rectal examination could not identify the uterus. Diagnosis of uterine inversion was made and the patient was submitted to total abdominal hysterectomy with bilateral salpingo-oophorectomy and pelvic lymph node sampling. The postoperative course was uneventful and the patient was discharged on the 5th postoperative day. She underwent postoperative pelvic radiation, and no recurrence was found during the 19-month follow-up period. Conclusion: Chronic non-puerperal uterine inversion can be considered a rare complication of malignant mixed müllerian tumor of the uterus.