1. Objectives: The purpose of this study was to find out the distributional characteristics of dyspepsia according to Sasang Constitution. 2. Methods: The medical records of 108 subjects who have received prescriptions and diagnosis of Sasang constitution from June 2007 to April 2009 at a Korean Medical clinic in Seoul were reviewed. General factors and the frequency of the prescriptions according to Sasang constitution are compared and analyzed. 3. Results: Among the 108 subjects, 57(52.78%) persons were Soyangin, 27(25.00%) Taeumin, and 24(22.22%) Soeumin. The frequencies of the prescriptions of interior and exterior disease were compared. Exterior disease(89.47%) was higher than interior disease in Soyangin and interior disease was higher than exterior disease in Taeumin(88.89%) and Soeumin(91.67%). (p-value<0.001) The most common disease was Mangeum-syndrome(73.68%) of exterior disease in Soyangin, Dry-febrile symptom(88.89%) of interior disease in Taeumin and Taeum-syndrome(66.66%) of interior disease in Soeumin. 4. Conclusion: There were significant differences on the distribution of dyspepsia in interior or exterior disease according to Sasang Constitution.