A phase II trial of mitomycin, vinblastine, and cisplatin was undertaken in 26 patients with non-small cell carcinoma of the lung. A major response rate of 46% was seen in measurable and evaluable disease, with a complete response rate of 12%. Median duration of response is 6.5+ months (range, 2.5-19+). Toxic effects included moderate myelosuppression, mild neuropathy, mild azotemia, and severe nausea and vomiting. These results are similar to previously reported studies using vinca alkaloids and cisplatin alone.