Radiological findings of clonorchiasis, based on plain film, upper gastrointestinal series, hypotonicduodenography and percutenous transhepatic cholangiography, were presented in 11 cases of clonorchiasispathologically confirmed at Seoul National University Hosiptal during the period from July 1974 to May 1979. Nospecific features were noted in plain film of simple abdome, upper gastrointestinal series and hypotonicduodenography, as expected. Percutaneous transhepatic cholangiographic findings are as follows; 1. dilatation ofintrahepatic bile duct, more pronounced in the periphery ;10/11 cases. 2. irregular contour of intrahepatic duct ;9/11 cases. 3. filling defects ; 9/11 cases 4. hazy appearance of intrahepatic duct ; 8/11 cases. 5. irregularcontour of common bile duct ; 7/11 cases. 6. dilatation of common bile duct ; 3/11 cases. 7. enlargement of gallbladder ; 3/11 cases.