Solitary pulmonary lymphangiomas are extremely rare. We report here on an unique case of solitary pulmonary lymphangioma in an adult. A well-circumscribed, 6 cm-sized, pleural based lesion with fluid attenuation was found in a 50-year-old Korean male. He had no previous history of disease or trauma. The wedge-resected lung revealed an ill-demarcated lesion with multiple microscopic cysts and the cystic walls had loose intervening stroma.