Introduction: Sudden cardiac arrest is a leading cause of death. Family members often witness the event and attempt resuscitation. The physiological and psychological impact of a loved one’s death, witnessed or unwitnessed, can be significant and long-lasting. However, little is known about the care needs of families during the cardiac arrest care of a loved one. This scoping review protocol was designed with, and will be performed in partnership with, persons with lived experience of sudden cardiac arrest (survivors and family members of survivors and nonsurvivors alike). Methods: The review will be performed in accordance with accepted methods such as the Arksey and O’Malley methodology framework and the Levac extension. We will search multiple databases, and Google Scholar for both qualitative and quantitative scientific literature. Articles will be screened, extracted, and analyzed by a team with lived experience of cardiac arrest. Two reviewers will conduct all screening and data extraction independently. A descriptive overview, tabular and/or graphical summaries, and a directed content analysis will be carried out on extracted data. Discussion: This protocol outlines a planned literature review to systematically examine the nature of existing evidence to describe what the care needs of families experiencing the cardiac arrest of a loved one are. Such evidence will contribute to the development of strategies to meet identified care needs. Persons with lived experience participated in the creation of this protocol, and they will also participate in the execution of this review as partners and coinvestigators, not as research subjects or participants. The results of the scoping review will be disseminated upon completion of the work described in this protocol.