Malignant Mixed Mullerian Tumors (MMMT) are part of the malignant neoplasms of the uterus. They have aggressive growth and bad prognosis. Usually at the time of diagnosis the disease is already too advanced. Almost all of these tumors occur after the menopause and the most frequent presenting symptom is vaginal bleeding. A few cases of patients who underwent surgery at Second Gynecology Clinic at the University Hospital of Obstetrics and Gynecology "Maichin dom"-Sofia are presented.