This study focuses on the continuity and disruptions of foster placements in France. Its aim is to understand the effects on emotional regulation (coping strategies and temperament) of fostered children and adolescents. Participants were 221 French children aged 7 to 16. Three types of French placement history were examined (single placements, multiple placements, and mixed parental and foster home placements). Children with no experience of maltreatment provided a normative reference. A quantitative method was used, including a coping strategy scale and a temperament questionnaire. Results indicate that children in the multiple placement group were more emotionally vulnerable than those in the other groups. Findings suggest that particular attention should be paid to ensuring stability in placements. A number of recommendations are made to promote stability, including coordination of child welfare and family support agencies, and training and support of foster families.