This study aims to review legal problems of similar medical practice and suggest methods of improvement. Similar medical practice refers to all medical practices conducted in the state that human qualification is not fulfilled. It may cause serious damages on health and lives of national people. Currently, similar medical practices are recognized as unlicensed medical practices and prohibited based on the Medical law and additionally punished by then special law in Korea. However, the current Medical Law does not provide clear and accurate concept of medical practices so that it is difficult to regulate similar medical practices. The issue of complementary and alternative therapy related to similar medical practices is also in special state different from other countries. In addition, since similar medical practices lack of evidences in terms of safety, the dangerousness of accidents is high and it may affect badly on health of national people and health care policies. Methods of improvement in order to resolve problems regarding similar medical practices are: first, concept and scope of medical practice should be clear, accurate and concrete. Second, complementary and alternative therapies related to similar medical practices need to be strictly examined and the supervisory right should be given to doctors should be given even though a part of it is allowed. Third, research institutes specialized in the field should be established for scientific examination of complementary and alternative therapy and objective research results should be open to the public. Finally, since damage cases caused by similar medical practices by non-medical personnel, national management and supervision for similar medical practices should be reinforced.