This article considers the relationship between ethics and moral development. Ethics, as a philosophical discipline, cannot ignore the psychological dimension of conscience on which it is based. But conscience, from the psychological point of view, cannot guarantee the knowledge of good and evil, since it is not innate, but an acquired structure. This relationship between philosophy and psychology give rise to several questions: how is moral conscience developed? How does moral conscience differentiate good and evil? Has moral conscience coercive effect on behavior? These and other issues are examined in the article from a metaphysical, epistemological and psychological point of view.En este artículo se plantea la relación entre ética y des...