The patient was a 63-year-old female, who was admitted to the National Nagoya Hospital with complaints of left cervical and bilateral axillary lymphadenopathy on 12 May, 1987. Since May 1985, with the diagnosis of non-Hodgkin lymphoma, she had been successfully treated with combination chemotherapy (VEPA) and radiotherapy at another hospital. Left axillary lymphode biopsy revealed a diagnosis of non-Hodgkin lymphoma, diffuse large cell type. Then, she was given intravenous administration of carboplatin (400 mg/body) on 26 May, 1987. After a single course of this regimen, the lymphnode swelling subsided, and she achieved complete remission on 6 June. Thereafter, she was placed on the maintenance chemotherapy of carboplatin (400 mg/body) every 5 weeks. Through the whole course of this patient, the serum levels of blood urea nitrogen and creatinine were normal, and she did not notice nausea, vomiting and peripheral neuropathy. To our knowledge, this is the first report of complete response by the administration of carboplatin for non-Hodgkin lymphoma.