We reported two cases of biIe duct anomalies detected by percutaneons transhepatic cholangiography. The first case was a 53-years-old woman who had a long cystic duct running paralleI to, and apparently adhered to a common hepatic duct distally, thus forming one large duct separated by a thin membrane within. Stenosis of the lower bile duct and subsequent dilatation of the proximal part of the duct were also demonstrated. In the second case, 5-years-old girl, the most conspicuous findings include stenosis of the extrahepatic duct with the resultant dilatation of the proximal par t of the common hepatic duct and bilateral hepatic ducts. Distally displaced opening of the common biIe duct to the duodenum and aberrant run of the duodenum were also disrcovered radiographically.