Twenty cases of advanced neuroblastoma treated at the Pediatric Surgical Department of Chiba University from 1975 through 1985 were discussed. Cis-dichlorodiammineplatinum (CDDP) and VM-26 were administered to 7 patients with disseminated neuroblastoma resistant to treatment with cyclophosphamide, doxorubicin and vincristine. One complete remission, 4 partial remissions, and 2 minor responses were observed in our series. These results were far better than in our previous study, in which patients were treated with regimens containing cyclophosphamide, doxorubicin and vincristine. Several kinds of side effects were observed in children treated with CDDP. Vomiting occurred in all of them, and bone marrow toxicity was found in 5 among 7 patients. There was one case of severe nephrotoxicity caused by severe proximal tubular dysfunction with increased urinary loss of sodium, leading convulsion.