Traumatic hemobilia consists of hemorrhage into the biliary tract as a result of abdominal trauma. The classical triad of biliary colic, jaundice and upper gastrointestinal bleeding is not a constant finding, and clinically silent hemobilia has been reported. The treatment of choice is selective embolization, but spontaneous cessation of bleeding can occur, especially in mild forms. We report a case of occult traumatic hemobilia in which the diagnosis was suggested by transitory changes in ultrasonography and hepatic biochemistry.