In this paper I try to show a rough outline of the problems of medical ethics. The first step is to analyze the medical practices into six elements: 1 medical professionals, 2 a patient who needs treatment, 3 relationships between medical professionals and a patient, knowledge, technique and method of medicine, 6 ethical norms and laws, 6 medical resources. From a viewpoint of those six elements we can restate Oath of Hippocrates and four principles of biomedical ethics proposed by T. Beauchamp and J.F. Childress. In a similar way, we can grasp an outline of contemporary problems of medical ethics, and furthermore, we can show a very rough sketch of problems of medical ethics that may occur in the future. Finally I refer to the essence of medicine which is now and will be called into question in medical ethics.
