On rare occasions, Obstructive jaundice may be caused by a benign tumor of the biliary tract. We describe a patient in whom the diagnosis of an adenoma of the distal common bile duct(CBD) was established. The CT showed a soft tissue density mass in the distal CBD and diffuse dilatation of the intrahepatic duct, gall bladder, and CBD. Endoscopic retrograde cholangiopancreatography showed an irregularly marginated polypoid mass in the distal CBD. The clinical, radiological, and histological features of this neoplasm are reviewed.