Percutaneous Transhepatic Cholangiography (PTC) with blind method was performed in. 31 patients of suspected obstructive jaundice from Oct. 1977 to Sept. 1979. The results were as follows; 1) Thirty one subjects examined included 16 cases of male and 15 cases of female. Age distrihution revealed peak incidence of the 7th decade. 2) Successful cholangiogram was obtained in Ro cases (g6. 8%). R) Correspondence between PTC finding and postoperative finding was 80%. 4) PTC was well visualized in 3 cases with low bilirubin level(below 3. Omgg), however, oral cholecystography and Ivcholangiography showed non-visualization in same subjects. 5) Among 14 cases of cholangiocarcinoma, each 6 cases were located in upper and lower segment and 2 cases middle segment. 6) Complications of PTC revealed fever and epigastralgia in Z cases.