Thirty-two evaluable patients with stage III non-small cell lung cancer were treated with the combination of ifosfamide (4 g/m2), with uroprotective mesna, mitomycin (6 mg/m2), and cisplatin (100 mg/m2). The overall response rate was 68.8% (complete response rate, 21.9%; partial response rate, 46.9%). Toxicity was moderate and manageable. Based on the response rate observed, this three-drug combination could be considered for future randomized phase III trials against non-small cell lung cancer.