Understanding of the anatomy of the hepatic vein is important in manipulation for transplantation of the liver, hepatectomy and the treatment of hepatic trauma with avulsion of the hepatic vein. Demonstration of the inferior right hepatic vein is also important; in some cases of hepatocellular carcinoma, . thrombus can be seen in the IRHV; in primary Budd-Chiari syndrome, the IRHV is the main draining vein; during hepatectomy, the postero-inferior segment of the right lobe and draining IRHV can be preserved. For some 10 months ultrasound examination was done in a total of 124 patients with normal liver functon with special emphasis on the hepatic veins, their branches, and the IRHV, and analysed in terms of branching pattern and relative size of the hepatic vein and the detection rated of the IRHV.