Objective: An evaluation study was conducted in order to evaluate the impact of the treatment program for sexually abused children. Method: Forty-one (41) children (aged 6–17 years), victims of a sexual abuse by a family member, were assessed at pre-and post-treatment (16 months following the pre-test). The evolution of children's psychological well-being was measured by the Children's Depression Inventory (CDI), the Picturial Scale of Perceived Competence and Acceptance for Young Children (PSPCA), the Children's Nowicki-Strickland Internal-External control scale (CNS-IE), the Children's Action Tendency Scale (CATS), the Revised Children's Manifest Anxiety Scale (RCMAS), and the Pediatric Behavior Scale (PBS). A hierarchical multiple regression analysis was used to assess the strength of the relationship between the level of participation in both individual (including dyadic and family therapy) and group therapy and the evolution of Ss' psychological well-being. Results: Results indicate that the child's mental health was generally positively related to the level of participation in individual therapy but not related or negatively related with the level of participation in group sessions except for the PBS. Conclusions: These results indicate the need: (a) to consider the adoption of a dose measurement in the appreciation of the therapeutic impact; (b) to have a better grasp of the nature and the effects of specific therapeutic activities included in a program; (c) to have a better understanding of the disparities observed between parents' and children's evaluation of the psychological status of the child.