The article presents a complex model of formal and informal sources of academic ethics in Poland. The author analyzes three models: 1) the model of integrity and credibility, 2) the model of ethical infrastructure and 3) the model of social responsibility. However, we are assuming that this model is a complex system, because it consists of various kinds of sources of academic ethics standards, both legal and moral sources. These three models, however, do not appear in Poland in pure form. Rather, it was a case of evolution in which the next model contained elements of the earlier model. The process of gradual erosion of the classical model (integrity and credibility of science) is the result of a strong influence of external conditions, mainly postulates of social responsibility of science and increase of effectiveness of scientific research.