Concurrent different histopathological types of gynecologic tumors arise rarely. We present ovarian serous and cervical squamous cell carcinoma formed synchronously. A 68 year-old-patient with gravida 1 parity 1, admitted to our hospital with complaint of abdominal distention. We determined distended abdomen due to acid, hypertrophic and erosional cervix, normal uterus size, free parametrial areas and massive lesion filling whole douglas. After acid cytology sampling, cervical and endometrial biopsies were taken. The patient was underwent optimal debulking (according to the Gynecologic Oncology Group, optimal cytoreduction is defined as the largest residual tumor nodule measuring 1 cm or less) and systematic pelvic and paraaortic lymph-node dissection. Pathological diagnosis resulted as ovarian serous carcinoma stage 3C and synchronous squamous cell cervical carcinoma stage 1B1 (The International Federation of Gynecology and Obstetrics staging system). Finally, combination chemotherapy of adjuvant carboplatin and paclitaxel together with radiotherapy were applied but she died after 22 months due to progressive disease. Thus, preoperative assessment must be done very carefully as surgens come across with synchronous gynecologic tumors.