The task of the professional in psychology is exercised from ethical principles that necessarily go through the values of respect, beneficence and justice. How these values are understood, assumed and applied in daily practice is something that every psychologist needs to answer, once his activity places him in front of others with whom he is involved. This book sheds light on these and other questions related to the Psychology career, since it presents a set of reflections and proposals, from different perspectives, on the ethical foundations and dilemmas faced by those who study, teach, or practice this specialty. Each one of the authors who participate in this volume contributes elements for the examination of ethics thought and applied in psychology, through different methodological tools and from their experience in clinical or research areas. The confluence of different currents of thought allows us to confront their particular positions, as well as the theoretical-technical knowledge in which these professionals work. In view of the current moral crisis, these pages have the purpose of enriching the cultural development of the profession, since every exercise within this discipline leads to seeing oneself as a social agent with and for the other.