Hemobilia is a status of bleeding into the biliary tract, which is caused by abnormal communication between the intrahepatic blood vessels and biliary tract, and is a rare cause of upper gastrointestinal hemorrhage. Most cases of the hemobilia originating in the gallbladder are related to gallstones. However, hemobilia is a rare complication of calculous cholecystitis. We report a case of hemobilia as a complication of calculous cholecystitis in a patient given continuous aspirin medication. (Korean J Gastrointest Endosc 2007;34:174178)