The article reviews the evolution of the deontology of the Spanish Medical Organization through how it has been reflected in the diverse codes of deontology approved by this institution. After an approximation to the spirit and contents of the first Code of ethics approved in 1978, born after the Spanish Constitution, passed that same year, which established the recognition and the need to regulate professional associations and the exercise of qualified professionals. The 1978 Code is compared with the one recently approved in December 2022, using the second 1990 Code as a bridge. In the comparison we find many bioethical issues on which, through the last decades, reflections have been made and answers have been introduced that respond to the many social and technological changes that have occurred. Special reference is made to the concept of respect, embodied in the relationship between the doctor and the patient. It is a relationship that is often not symmetrical because the sufferer may feel or endure extreme vulnerability. The article also reflects on the evolution of relevant issues or those that may raise more controversies, such as respect for initial and final life. The synthesis of the current 2022 Code of Medical Ethics can be done in three words: Respect and Human Rights.