PURPOSE: Combination chemotherapy with cisplatin and etoposide have been considered as one of the chemotherpy regimen for non small cell lung cacer(NSCLC) with the response rate of 20~40%. Ifosfamide is one of the most active agent against NSCLC. And so, we initiated a phase II trial for advanced NSCLC to determine the effect of PIE(cisplatin, ifosfamide, etoposide) regimen. MATERIALS AND METHODS: 36 patients with inoperable non-small cell lung cancer who had no prior systemic chemotherapy were treated with combined ifosfamide (1,800 mg/m2 plus mesna 1,100 mg/m2 by intravenous continuous infusion daily for 3 days) with cisplatin (20 mg/m2 intravenous for 3 days) and etoposide (80 mg/m2 intravenous for 3 days). We evaluated the response rate, survival and toxicities of these patients. RESULTS: The objective response rate was 28%(CR; 2/36, 6%, PR; 8/36, 22%). Among 10 responders, 7 patients were in good ECOG performance status(0~1). The mean survival of all these patients were 43 weeks(8~141 weeks); the responding patients survived longer than the non-responders(median survival; 59 weeks vs 28 weeks, p<0.05). The toxicities of this regimen were acceptable without treatment related toxic death. CONCLUSION: We concluded that PIE regimen is effective in the treatment of advanced non-small cell lung cancer with acceptable toxicities and long-term follow up is warranted.