Nursing is one of the core part of the medical practices. Traditionally, nursing is aid work of doctor’s practices. Also, the Supreme Court supports this point of view. However, the nurse is a professional occupational group and nurses are trained as professionals during their educational courses. Also, the government supervises the license of nurses. As the medicine develops, medical practices are more specified and a lot of medical professionals are involved in treating a patient. In this changed situation, some of the nursing practices can not be recognized by doctor and there are no needs to recognize. I proposed some nursing is independent tasks of nurses in this article. If we agree this point of view, we recognize the concept of “cooperative nursing.” Cooperative nursing is a concept which designates the cooperative practice by more than two nurses. In this field, a participant is allowed to trust that other participants will do good nursing.