A general review is made on Insamyangwitang(人蔘養胃湯). Following conclusions are drawn from the clinical cases of Insamyangwitang in Hyungsang medicine. 1. Insamyangwitang is composed of four different prescriptions of Huisaentang, Sakoonjatang, Eajintang and Pyungwisan. Huisaentang is usually prescribed for the intestinal convulsion. Sakoonjatang for the deficiency of Ki. Eajintang for retention of phlegm. 2. Insamyangwitang is effective in strengthening the spleen, drying the dampness, warning the middle-warmer to stop vomiting, regulating the flow of Ki, and eliminating phlegm. 3. Insamyangwitang is applicable to malaria caused by cold, intestinal convulsion, abdominal mass, edema, tympanites, Yin syndrome of exogenous febrile disease, distension, lack of appetite, stomachache, and diarrhea. 4. Persons with the following characteristic in Hyungsang are more susceptible to Insamyangwitang : Jung type, Hyul type, fish type, Taium meridian type, white fat damp constitution, person with big mouth, and woman rather than man.