This chapter first reviews different models of family therapy for eating disorders, then reviews and synthesizes the evidence from uncontrolled trials and randomized controlled trials. The goal of structural family therapy is to alter the overall structural organization of the family through limiting pathological patterns of family interaction, by challenging alliances between parents and children that limit parental effectiveness, by encouraging development of stronger sibling subsystems and by encouraging more open communication. As involvement of family members appears to be important when treating adolescents with bulimia nervosa (BN), cognitive-behavioural therapy (CBT) for BN has recently been modified for this age group. Intervention for eating disorders involving several families at the same time is a relatively new approach that has most commonly been seen in the psychiatric literature in the area of schizophrenia. The importance of families in treatments for adolescent eating disorders must be underscored.