Primary pulmonary extranodal marginal zone lymphoma (PPEMZL) arising from the mucosa-associated lymphoid tissue of the bronchus is a very rare disorder. It appears in the form of a slowly progressing localized mass or consolidation. Clinical presentation may include non-specific pulmonary symptoms, such as chronic cough, or dyspnea, but it is more often diagnosed incidentally. Computed tomography (CT) the thorax revealed that the present patient had a giant cystic lesion, parenchymal nodules, and consolidation area. The patient was symptomatic and diagnosed as marginal zone lymphoma by immunohistochemical study of the transthoracic biopsy specimen. This patient is thought to be the first diagnosed as PPEMZL from a cystic lesion.