We examined the efficacy and toxicity of a divided schedule of cisplatin and vinorelbine with concurrent radiotherapy followed by surgery in patients with locally advanced non-small cell lung cancer (NSCLC). Patients with clinical stage IIIA or IIIB NSCLC were eligible if they had a performance status of 0 or 1, were 75 years or younger, and had adequate organ function. Patients were treated with cisplatin (40 mg/m2) and vinorelbine (20 mg/m2) on days 1 and 8 every 3 weeks. Thoracic radiotherapy (2 Gy per fraction; total dose, 40 Gy) was given concurrently. Surgical resection was performed after induction therapy had been completed. If disease was considered clinically inoperable after induction therapy, patients received 2 additional cycles of the chemotherapy and 20 Gy of additional radiotherapy. Twenty-three patients (20 men and 3 women; median age, 63 years; age range, 45-72 years) were enrolled. The overall response rate was 78.3%. Although grade 3-4 toxicities included neutropenia in 95.7% of patients and anemia in 39.1%, no grade 3-4 radiation pneumonitis or esophagitis occurred. Thirteen patients (56.5%) underwent thoracotomy and complete resection. There were no treatment-related deaths. The median survival time was 36 months (range, 4-78 months), the 2-year survival rate was 74%, and the median time to disease progression was 15 months (range, 2-59 months). This trimodality therapy is effective and well tolerated and is an acceptable therapeutic option for patients with locally advanced NSCLC.