Background To practice nursing ethics, students must first understand the ethical concepts and principles of their profession, but despite this knowledge, students face challenges in implementing ethical principles in clinical settings. The educational performance of nurse educators is critical in resolving these challenges. This study focused on the lived experiences of nurse educators. Objective To address the main concern of educators when teaching ethics to undergraduate nursing students and how they deal with it. Research Design We conducted this qualitative content (...) analysis in Iran in 2020. We used individual semi-structured interviews to collect, record, and transcribe data, as well as Graneheim and Lundman method to analyze them. Participants and research context: We used purposive sampling to select 11 nurse educators who either were currently in the position of ethics educators or had taught ethics from Iranian universities of medical sciences. Ethical considerations The present study received the code of ethics No. IR.MODARES.REC.1399.036. Participants were aware of the study’s purpose and signed a consent form to participate in the study. We considered data confidentiality and the voluntary principle in data collection. Findings Nurse educators’ main concern was how to sensitize students to ethical principles in clinical settings, so they tried to involve students in the teaching process, to repeat and practice ethical principles and concepts, simplify and simulate ethical principles and concepts, and provide opportunities for students to gain clinical experiences. Discussion To sensitize students to ethical nursing care, nurse educators try to institutionalize ethical principles using different teaching methods, including students' involvement in teaching, experiential learning through simulated situations, practice, repetition, and provision of opportunities for practice and experience. Conclusion Improving students’ cognitive ability and objectifying moral concepts and principles for students will institutionalize moral values in them that are fundamental for their moral sensitization. (shrink)