Introduction: Ethical competence in professional practice can be considered essential among nurses and nurses in ambulance care encounter ethical dilemmas frequently. To enhance ethical competence among students in the ambulance specialist nursing program, high-fidelity simulation scenarios including ethical dilemmas were introduced as a learning activity. Research aim: The research aim was to investigate the usefulness of high-fidelity simulation in ambulance specialist nurse education to teach ethical reasoning when caring for children. Research design: This study was conducted as a qualitative interview study, complemented with observations and using field notes and qualitative interviews for data collection. Data was analysed using deductive qualitative content analysis based on a care ethical model. Participants and research context: Participants (n = 35) were recruited from an ambulance nurse educational program at a Swedish university. Data was collected after the students took part in two high-fidelity simulations involving children in an ambulance care setting. Ethical considerations: The study has been vetted and approved by the ethical council at the University of Borås, Sweden. The study follows the Helsinki Declaration?s advice on ethical principles. Results: The results showed that most of the students expressed some form of ethical reasoning during the simulation sessions, which were elaborated and reflected upon during the debriefing part of the sessions. The simulation design seemed to have a great impact on the outcome of the student's ethical reasoning, where increased immersion led to deeper emotional engagement among the students which increased awareness of their personal preconceptions. Conclusions: This study aimed to investigate whether high-fidelity simulations could be useful to stimulate ethical reflections and contribute to increased ethical competence among students. In conclusion, a well-designed high-fidelity simulation can be useful as an educational tool to learn and enhance ethical competence among specialist ambulance nursing students.