Five cases of MALT lymphoma of the lung performed surgical resection were reviewed in special reference to CT findings and prognosis. There were two male and three female patients whose ages ranged from 50 to 77 years. All patients were asymptomatic. On CT images a consolidation with air-bronchogram was seen in four cases, and CT angiogram sign was also recognized in two of the four cases. Homogeneous nodular consolidation with clear margin was seen in the residual one case. All patients underwent complete resection with negative margins, and received no adjuvant chemotherapy. Eightynine months after the resection, one patient died of unrelated cause without recurrence. At the time of last follow-up, three patients were alive and well without any signs of recurrence for 48, 58, and 82 months after the operation, respectively. The remaining one patient had recurrence in the contralateral lung and celiac lymph node at 55 months after the operation. She received chemotherapy, and is alive, as of 67 months after the resection.