Medicine requires uniquely high levels of motivation, ethics, and altruistic values and behavior. This study was conducted to redefine character education in medical education and to identify and evaluate the core elements of physicians' character.A 3-round Delphi survey was conducted by professors of medical education, physicians, experts from nursing school, and head nurse in Korea. A consultant group (CG) was formed to prepare the Delphi survey, discuss the research results, and to set directions for future initiatives. The Delphi survey was conducted three times between September and November 2018.From the first-round Delphi survey, which inquired about the 10 key character elements required for medical students, a total of 420 elements were collected. The top 10 categories were selected and classified. After the second and third rounds of the Delphi consensus process and a series of CG meetings, the following 8 core categorical elements were identified: service and sacrifice, empathy and communication, care and respect, honesty and humility, responsibility and calling, collaboration and magnanimity, creativity and positivity, and patience and leadership. The average score of medical graduates for the core elements ranged from 2.45 to 3.46 (standard deviation: 0.23-0.60) on a 5-point Likert scale.Eight core categorical elements of the character of medical students were identified. The results of this study can be used as a reference for establishing goals and desired outcomes of character education at the level of undergraduate or graduate medical education.