The authers analyzed ultrasonographically the total 22 cases of clonorchiasis verified by stool examinationand skin test and operation at Busan National University Hospital and St. Benedict Hospital for about 21 monthsfrom Jan. 1981 to Sept. 1982. 1. Clinical materials were consisted of 18 males and 4 females who showed rightupper quadrant pain in 20 cases (90.9%), being most common, and elevated phosphatase in 13 cases (59.1%),eosinophilia in 10 cases (45.5%) , elevated SGOT in 10 cases (45.5%), elevated total bilirubin in 9 cases (41.0%),complication of hepatoma in 2 cases (9.1%), and liver cirrhosis in 4 cases (18.2%). 2. On ultrasonogram, the gallbladder showed tense spherical shape of wall in 17 cases (77.3%), more than 10cm in the longest diameter in 4cases (18.2%), more than 3mm in the wall thickness in 9 cases (41.0%), and low level echogenicity withliquid-liquid level in the dependant part in 16 cases (72.7%). 3. The main bile duct showed more than 4mm indiameter considered as normal or moderate dilatation in 17 cases (77.3%), 1-2mm in the wall thickness, being mostcommon, in 10 cases(45.5%), more than 2mm in 6 cases (27.3%), and intraluminal low level echogenicity in dilatedduct in 13 cases (59.1%), and thickened wall and the strong echogenicity of wall in 16 cases (72.7%). 5. The gallstone was associated in 2 cases (9.1%), and the stone of biliary duct in 2 cases (9.1%)