Free-floating tumor debris or mucobilia as a cauae of intermittent obstruction has been described infrequently. A middle aged woman with intermittent jaundice caused by abundant mucus from an intrahepatic mucinous cholangiocarcinoma is presented. Symptoms of juandice, midepigastric pain and fever developed despited an intitial cholecystectomy and common bile duct stone extraction using endoscopic retrograde cholangography (ERCP). Intraductal mucin was diagnosed through on ERCP and confirmed intraoperatively and pathologically as the cause of the obstructive juandice. The patient remained asymptomatic and without evidence of disease for more than 2 years postoperatively. Description is presented of the patient who was admitted presented with recurrent cholangitis caused by profuse secretion of mucus by mucin-producing cholangiocaricnoma, with a review of relevant literature. (Korean J Gastrointest Endosc 18: 957-962, 1998)