We have clarified that computed tomography of pancreas can be divided into three types each in margin and content, namely 1) smooth type 2) fine-granule type 3) rough-granule type. In rough-granule type, rough granules are surrounded by low density area whose CT value is around -80. This CT value suggests that in rough-granule type, large amount of lipid may be present in pancreas. In this report, pancreatic CT scan of 406 persons without gall stone, diabetes mellitus, liver cirrhosis, pancreatitis and malignant tumor were studied. Incidence of the rough-granule type was very low in lean persons, while that of the rough-granule type was high in obese persons. Present results indicate that these types of pancreas in CT scan has intimate relation to body constitution. We discussed the clinical significance of this classification of pancreatic CT scan in relation to lipid deposition in pancreas. (author).