This paper starts from the Japanese manga Black Jack, which is also a medical bible in Japan, to try to explain the development of medical professional ethics and manga culture. This paper will point out why a manga can become a medical classic, how the Japanese doctors that are influenced by Black Jack face the medical behavior and medical ethics. On the other hand, this paper will deal with the key to developing manga culture: manga must be treated conscientiously. That Black Jack has become a medical classic lets us know the possibilities of manga culture; the mangaist's professional ethics do not merely exist in the manga text, but can face the public, enter social life and turn into the practical experience of everyday life.