1. Objectives Chronic pyelonephritis is one of the obstinate disease in current medicine. chronic pyelonephritis can be healed through cooperative treatment of western medicine and Sasang constitutional medicine. 2. Methods This patient who was not treated by western medicine alone was healed when Sasang constitutional medicine was prescripted with modern western medicine 3. Results We can get significal changes in lab results when western medicine and clinical Sasang constitutional medicine was practiced together. 4. Conclusions We suggest that cooperation with western and Sasang constitutional medicine is much effective in treating chronic pyelonephritis and other obstinate diseases.