Background and aim: the healthcare workers, mostly in emergency departments, are exposed to emotionally strong situations: this condition often can lead them to operate incorrectly. In the face of the mistake, many of them experience psychological trauma, becoming “second victims” of the event. In this case they can find comfort in dealing with Peers that can help to understand emotions and normalize lived experi- ences. A scoping review was conducted to clarify the key concepts available in the literature and understand Peer Support characteristics and methods of implementation. Methods: scoping review approach of Joanna Briggs Institute was used. "e reviewers analyzed the last twenty-one years of literature and extracted data from relevant studies. Results: 49 articles were relevant. Articles involve mostly physicians and nurses, but all the other healthcare professionals are included. 56% of the articles have been published in the last two years during the Covid 19 pandemic, which revealed the growing need of developing Peer Support programs; the Anglo-Saxon countries are the main geographical area of origin (82%). Peer support emerges as a preclinical psychological support for people involved in tiring situations. It’s based on mutual respect and on voluntary and not prejudicial help. Peers are trained to guide the support relationship. Peer Support can be proposed as one to one/group peer support, or through online platforms. Conclusions: many of the studies aðrm that the personnel involved have benefited from the programs available. It is necessary to carry out further research to determine the pre and post intervention benefits.