The pathophysiological mechanisms of hemobilia are discussed on the basis of clinical observations which required different treatment modalities, such as direct hemostasis, arterial ligature, and liver resection. The video shows a segmentary liver resection for delayed hemobilia due to a post-traumatic intrahepatic aneurysm. Intraoperative echography was essential in localizing the intrahepatic lesion and in guiding the extent of the resection.