Ovarian carcinosarcoma is a rare gynecologic malignancy that tends to develop in elderly women. This tumor consists of both carcinomatous and sarcomatous components and is associated with a poor prognosis. Because of its rarity, the optimal chemotherapeutic regimen to treat this tumor is yet to be determined. We report 4 cases of ovarian carcinosarcoma treated with paclitaxel/carboplatin(PC)therapy. The median age was 67 years(range, 64-72 years). Two patients with stage II c disease underwent a primary debulking surgery; one had microscopic residual and the other had<1 cm residual disease, and both patients received adjuvant PC therapy. In 2 other patients, a stage III patient and a stage IV patient, a partial response was achieved with neoadjuvant chemotherapy. They underwent an interval debulking surgery(residual disease<1 cm in both patients)followed by additional PC therapy. Recurrence developed in 3 patients except for 1 stage II c patient with microscopic residual disease. These 3 recurrences developed in the pelvis. Progression-free survival ranged 3-15 months; in the stage II c patient, disease progressed during adjuvant PC therapy. Overall survival of the 3 patients with recurrence ranged 6- 41 months. In conclusion, paclitaxel and carboplatin chemotherapy is an effective regimen for ovarian carcinosarcoma, although the duration of response is relatively short.