To compare the relative efficacy of two types of group cognitive-behavioral therapy for treating the traumatized child and at-risk or offending parent in cases of child physical abuse (CPA), 24 parents and their children were treated with Combined Parent-Child Cognitive Behavioral Therapy (CPC-CBT) and 20 parents were treated with Parent-Only CBT. Outcome measures assessing children's emotional and behavioral functioning and parents' parenting skills were administered to both parent and child participants before treatment, after 15 sessions of treatment, and 3 months after the completion of treatment. A series of correlated t tests and analyses of covariance were used to compare the scores on the outcome measures. The children and parents in the CPC-CBT group demonstrated greater improvements in total posttraumatic symptoms and positive parenting skills, respectively, compared to those who participated in the Parent-Only CBT group. The parents in the Parent-Only CBT group reported using less corporal punishment to manage their children's behavior at posttest than the parents in the CPC-CBT group. The differential benefits of including the child in treatment are discussed. (Contains 4 tables and 1 figure.)