Benign and malignant tumors are rarely encountered in the small intestine. Moreover small bowel metastases arising from the lung carcinoma are very unusual. Previous studies reported that the most common metastatic site of lung carcinoma was the esophagus and the most common histologic type was the squarnous cell carcinoma type. This case was duodenal and jejunal metastases from squamous cell carcinoma of the lung. The patient in this case com- plained of hematemesis and presence of movable mass in the lower left abdomen. N odular ul- cerative mass on the duodenal bulb was found by duodenoscopy, and an endoscopic biopsy re- vealed squamous cell carcinoma. A bronchoscopic biopsy determined squamous cell carcinoma of the lung. Abdominal exploration confirmed multiple metastases on duodenum, two sites of jejunum and Douglas pouch. So we report the case of multiple small bowel metastases from primary squamous lung carcinoma. (Korean J Gastronterol 1994; 26: 191 196)