This study evaluated the impact of a cognitive behavioral group therapy model in Brazilian girls who had experienced sexual abuse. The effect of the waiting period before treatment and the enduring effectiveness of the treatment after six and 12 months were also evaluated. Forty-nine female sexual abuse victims between the ages of 9 and 16 completed instruments measuring depression, anxiety, stress, and post-traumatic stress disorder before, during, and after the group therapy. The group therapy had a positive impact on their psychological functioning, significantly reducing symptoms of anxiety, stress, and post-traumatic stress disorder. The therapeutic effects lasted six to 12 months after the treatment ended. The model proved effective for treating young female victims of sexual abuse. (Contains 3 tables.)