A 60-year-old man complaining of right shoulder pain and numbness of right arm was diagnosed with Pancoast tumor (invasive right apical lung cancer). Chest CT scan showed a tumor, 5 cm in diameter, in the right apex invading the right posterior chest wall. The patient received preoperative CCRT (RT: 40 Gy/20 Fr, cisplatin: CDDP and etoposide: ETP), resulting in tumor regression (PR). The patient underwent right upper lobectomy (ND 2a), partial resection of the 1st-3rd ribs and Th 1 nerve. Pathological examination demonstrated no live cancer cells and organization of necrotic tissue in the lung and intercostal region (Ef. 3). The patient received postoperative chemotherapy (CDDP+ETP) and was discharged. He did well without any tumor recurrence for 1 year postoperatively. CCRT seems effective and is one of the standard treatments for Pancoast tumor.