In recent years, percutaneous transhepatic cholangiography(PTC) using fine needle has become widely employedas the procedure of choice for direct opacification of the biliary trees because of its high success rate, easyperformance and relative low complication rate. Authors present the clinical and PTC findings of experienced casesduring last four years, from May 1976 to June 1980, at the Department of Radiology, Korea Univeristy Hospital. Wetried to study of PTC in 44 cases, 32 mlaes and 12 females, and succeeded in visualization of bile ducts in 41cases, but the other three cases were failed to visualize the bile ducts. Final confirmative diagnosis wasachieved in 29 cases by operation, laparoscopy and other clinical methods. The PTC diagnosis was correct in 24 of 29 cases, and the others were incorrect. The 29 final diagnosis was including 13 cases of biliary stones, 6 casesof biliary cancer, 3 cases of pancreatic cancer, 3 cases of clonorchiasis, one case of CBD ascariasis and 3 casesof others. Incorrect PTC diagnosis was made in five cases. They were one case of nonvisualized intrahepaticstones, one case of hepatoma PTC diagnosed as cholangiocar cinoma, one case of pancreatic cancer diagnsoed ascholangiocarcinoma, one case of clonorchiasis diagnosed as biliary stones and one case of normal CBD which wasdiagnosed as distal CBD cancer. And we experienced one case of bile peritonitis as complicaiton, who was 35year-old female patient with multiple CBD stones, and aspirated about 500ml of bile stained ascites duringoperation.