The patient was a 52-year-old woman who underwent left partial mastectomy on April 30, 1999. The stage was T0N1bM1 (bone). After operation, adjuvant therapy consisting of 6 cycles of CMF therapy and radiation was performed. On September 2000, the tumor marker (NCC-ST 439) was at a high level. On January 2001, chest CT examination revealed multiple lung metastases of the right lobe. Oral combination chemotherapy of 5'-deoxy-5-fluorouridine (5'-DFUR, 1,200 mg/day) and cyclophosphamide (CPA, 100 mg/day) was thus performed, and definite improvement resulted in the lung. No adverse reactions occurred except for anemia and thrombocytopenia of grade 1. It is suggested that this oral combination chemotherapy may be useful for advanced recurrent breast cancer patients and applicable in ambulatory chemotherapy administered with consideration for the patient's quality of life.