Radiological findings of clonorchiasis, based on plain film, upper gasgrointestinal series, hypotonic duodenography and percutaneous transhepatic cholangiogrpahy, were presented in cases of clonorchiasis pathologically confirmed at Seoul National University Hospital during the period from July 1974 to May 1979. No specific features were noted in plain film of simple abdomen, upper gastrointestinal series and hypotonic duodenography, as expected. Percutaneous transhipatic cholangiographic findings are as follows : 1. dilatation of intrahepatic bile ducts, more pronounce din the periphery : 10/11 cases. 2. irregular controur of intrahepatic duct : 9/11 cases. 3. filling defects : 9/11 cases. 4. hazy appearance of intrahepatic duct : 8/11 cases. 5. irregular controur of common bile duct : 7/11 cases. 6. dilatation of common bile duct. : 3/11 cases. 7. enlargement of gall bladder : 3/11 cases.