The Department of Internal Medicine started in 1972 with the establishment of medical school and five professors. Through the constant efforts of the department members, we have made great progress and now we have grown to become the largest clinical medical school in medical school with 46 full-time faculty members. There are currently eight active subdivisions (digestive, heart, respiratory-allergy, renal, endocrine, hematologic, infectious, and rheumatic). Most of the Internal Medicine professors are in charge of the team leader in clinical education lectures at college of medicine. In the clinical field, which is the basis of clinical education, we are responsible for more than 30% of all medical care at Seoul and Guri hospitals and play a key role in cultivating practical and creative medical practitioners.