It is well known that acute pancreatitis is one of the aucte abdominal symdrome in which radiology can contribute a great deal towared the diagnosis. It was attempted to analyze the radiologic findings of acute pancreatitis in 186 cases who had been diagnosed clinically. Radiologic analysis was made including various radiographs of simple chest P-A, flat and upright abdomen, conventional upper gastrointestinal barium meal studies, oral cholecystography and intravenous cholangiography. Especially radiologic findings in the chest P-A and oral cholecystography were analyzed according to the serum amylase level. Results are as follows: 1. There was no significant difference in occurence between both sexes. 2. The main symptoms were abdominal pain, nausea and vomiting and the major physical finding was abdominal tenderness. 3. Abnormal findings of chest P-A was 27.4% (45/164). The incidence of Lt side pleural effusion was tow times frequent than the Rt and frequency of pleural effu ion seems to be higher in group of high serum amylase level. 4. Simple abdomen findings showed sentinel loop sign in 24%, Colon cut off sign in 18.5%. Specific signs of intra-abdominal fat necrosis was found in 2 cases. Pancreatic calcification was not found. 5. Conventional UGI studies showed duodenal C-loop widening in 33.7%, mucosal thickening 27.5%, mucosal spiculation 20%, antral spasm and antral pad sign 14.7% and indentation of lesser curvature 12.7% in descending frequency. 6. Non visualization of gall bladder in oral cholecystogram revealed 29,3% and non-visualization of common bile duct in intravenous cholangiogram revealed 13.5%. The incidence of non-visualization of gall bladder and common bile duct was higher in the group of higher serum amylase level.