Objective To evaluate the acute side effects and efficacy of three dimensional conformal radiotherapy(3DCRT)combined with chemotherapy(CT)for locally advance non-small cell lung cancer(NSCLC).Methods from May.2002 tO Dec 2004,36 patients with NSCLC were treated with three dimensional-conformal radiotherapy combined with chemotherapy navelbine+cisplafin(NP)Results The overall response rate(CR+PR)was 91.7% for the primary tumor,and 100%for metastases mediastinal lymph mode.The leucopenia mte was 94.4%(55.6%Grade 3.4)Acute radiation esophagitis occurred in 52.8%of patients(Grade 1.2)Acute radiation pneumonitis was observed in 11.1%of patients(Grade 1.2)Conclusion 3DCRT combined with CT is well tolerated in most patients with NSCLC.Its early responses are milder than the conventional radiotherapy combined with chemotherapy.Remote results awmt further follow-up