Ghostwriting in medicine represents a highly significant problem in both legal and ethical terms, and particularly in recent years owing to a sudden increase in the practice. The main goal in this paper is to present the legal and ethical rules connected with the ghostwriting phenomenon. The problem is presented in the context of international, European and Polish law. From a legal perspective the issues bound up with ghostwriting are those of the notion and authorship of a work, authors' rights (both moral rights and copyright), the content of these rights and their nature, as well as the question of the transfer of such rights. From the point of view of ethics there arises a need for reflection on honesty, accuracy and credibility as defined both generally and scientifically.