This study investigated the effect of an evidence-based family-focused intervention, Functional Family Therapy (FFT), on adult offenders’ mental health, family relationships, and risk of reoffending. The results showed that the participants who completed FFT experienced significant improvement in individual and relational functioning and they reported fewer symptoms of distress, less family conflict, and higher levels of family cohesion and organization. The findings also indicated that the FFT group had significantly lower levels of criminogenic risk than offenders who received traditional probation services. This study provides preliminary evidence for the relevance of a family-focused approach as a method for adult as well as youth offender rehabilitation. (APA PsycInfo Database Record (c) 2016 APA, all rights reserved)