Oral cholecystogaraphy after ingestaion of the 3.0 gr. Sodium tyropanoate (Bilopaque) was done in 504 patiensfrom Jan. 1983 to Aug. 1983. Simple supine views of the abdomen of 37 patient, in whom the gall bladder waseithrer nonvisualized or faintly visualized upto 17 houurs after Bilopaque administration, were reviewed in searchof the presence of conjugatd material in the bowel. The results were as follows; 1. The ratio of male to femalewas nearly 2:3, and age distribution was even from 20 years to 79 years. 2. Among 26 cases which showed conjugatedBilopaque in the bowel, cholecystitis with stoens was 20 cases(77% and acalculus cholecystitis was 6 cases(23%).3. Among 11 cases which showed no conjugated Bilopaque in the bowel hepatitis was 3 cases (28%) and clonorchissinensis, salmonellosis, pancreatitis, acute gastrities was 2 cases (13%) respectively. 4. All of the 20 cases ofcholecystitis with stone showed conjugated Bilopaque in the bowel. 5. Among 6 cases of which conjugated Bilopaquein the bowel, salmonellosis was 1 case(17%) and remaining 5 cases (83%) were acalculus cholelcystitis. 6. Theresults of our study show that the presence of conjugated Bilopaque in the bowel in nonvisualized or faintlyvisualized gall bladder after oral cholecystography is of definite indicative of cholecystitis. 7. Surgicalintervention or ultrasonographic examination of the gall bladder without double dose or second dose oralcholecystography on such cases is recommended.