This study examined the relationship between alliance and retention in family therapy. Alliance was examined at the individual (parent, adolescent) and family level (within-family differences) for families that either dropped out or completed family therapy. Participants were 31 Hispanic adolescents and their family members who received brief strategic family therapy for the treatment of adolescent drug use. Videotapes of first sessions were rated to identify parent and adolescent alliances with the therapist. Results demonstrated that Completer cases had significantly higher levels of alliance across all family members than Dropout cases, and Dropout cases had significantly higher unbalanced alliances than Completer cases. Clinical implications are discussed.