A rare case of pulmonary carcinoma with many psammoma bodies in a 60-year-old man is reported. Autopsy revealed a whitish subpleural tumor, with solid in consistency and 4 cm in diameter, of left S_ of lung and a lymphangitis carcinomatosa of both pulmonary surfaces. There were some solid matastases, up to 2 cm in diameter, in both lungs, the liver, the It. adrenal, the It. kindny, the submucosa of the urinary bladder, and the lumbar vertebral bone. Histologically the tumors revealed a poorly differentiated adenocarcinoma. Especially in the primary site of It. S_, many psammoma bodies were observed in the lumina of lymph-vessels invaded by tumor cells. That is, psammoma bodies were restricted to the invaded lymph-vessels. There were no psammoma bodies in any other lesions except the lymph-vessels of the primary site. The authors prefer in the present case to relate the mineralization of psammoma bodies to lymph-vessel invasion and degenaration of tumor cells.