In a holistic view of care, the family is important for the patient as well as for the staff and integration of family members in health care is a growing trend. Yet, family participation in the care is sparsely investigated and valid assessment instruments are needed.Data were collected from 200 family members participating in an intervention study at an emergency department (ED) in Sweden.The Person-centred Climate Questionnaire-Family (PCQ-F) is a measure for how family members perceive the psychosocial climate. PCQ-F is a self-report instrument that contains 17 items assessing safety, everydayness and hospitality--three subscale dimensions that mirror the Swedish patient version of the questionnaire, the PCQ-P.The aim of this study was to evaluate the psychometric properties of the Swedish version of the PCQ-F in an ED context.The psychometric properties of the PCQ-F were evaluated using statistical estimates of validity and reliability and showed high content validity and internal consistency. Cronbach's Alpha was >0.7 and item-total correlations were >0.3 and <0.7.In terms of psychometrics, the findings in this study indicate that the PCQ-F can be used with satisfactory validity and reliability to explore to what degree family members perceive ED settings as being person-centred, safe, welcoming and hospitable within an everyday and decorated physical environment. As the PCQ already exists in a valid and reliable patient (PCQ-P) and staff (PCQ-S) version, this new family member version is a significant addition to the literature as it enables further comparative studies of how diverse care settings are perceived by different stakeholders.