Carcinosarcoma is a rare entity of neoplasm especially in gallbladder, withcollision elements of both adenocarcinomatous and sarcomatous component. Its clinical behavior is even worse than that of carcinoma, yet few cases have been reported to date. A male patient 75 years old admitted in our hospital was finally diagnosed as carcinosarcoma. He underwent surgical resection and adjuvant chemotherapy with oxaliplatin-containing regimen for six cycles. The patient achieved a long-time survival of 30 months.