A 63-year-old man was admitted to our hospital because of dyspnea. Chest computed tomographic(CT)scans showed right pleural effusion. He was diagnosed with adenocarcinoma of the lung(cTXN2M1a, stage IV). Although combination chemotherapy with 80 mg/m / 2 cisplatin(CDDP)and 60 mg/m2 docetaxel hydrate(DOC)was performed for 3 courses, the pleural effusion increased. As he had a progressive disease, his chemotherapy was changed to a new combination of AUC5 carboplatin(CBDCA), 200mg/m / 2 paclitaxel(PTX)and 15 mg/kg bevacizumab. After 2 courses, the pleural effusion dramatically decreased. During 6-month follow-up after the initial consultation, there has been no exacerbation.