This document provides a set of basic ethical principles that define the professional responsibilities of university professors in their role as teachers. Ethical principles are conceptualized here as general guidelines, ideals, or expectations that need to be taken into account, along with other relevant conditions and circumstances, in the design and analysis of university teaching. It consists of seven areas of principles: content competence, pedagogical competence, dealing with sensitive topics, student development, dual relationships with students, confidentiality, respect for colleagues, valid assessment of students, and respect for the institution. Each principle is first stated, then briefly explained, and finally, illustrated with a negative example. (JLS)