Teamwork is essential in emergency medicine, but in practice it can be polluted by communication difficulties, a lack of understanding of everyone's roles and responsibilities, and a discordant definition of operating methods and objectives. Today, there is a strong awareness of the need to train medical and healthcare teams in interprofessional collaborative practice to learn how to work as a team, reduce medical errors and improve patient safety. Simulation is a recognized and effective pedagogical modality for achieving these objectives. It is now permanently established in pre- and postgraduate medical-nursing training courses in emergency medicine.