The aim of this study was to enhance the academic achievement of a child with Oppositional Defiant Disorder (ODD) through a cognitive-behavioral counseling program. The program was implemented on a single case, a 9-year-old school child with low academic achievement diagnosed with Oppositional Defiant Disorder according to the Diagnostic and Statistical Manual of Mental Disorders (DSM-5). To achieve this goal, a clinical case study approach was utilized, employing observation, clinical interviews, and three measurements of the child's oppositional behavior using pre-test, post-test, and follow-up measurements. The study results confirmed a positive impact of the cognitive-behavioral counseling program on the academic achievement of the child with Oppositional Defiant Disorder. The quarterly average increased from 4.57 to 6.38 in the second quarter, and further to 7.42 in the third quarter of the academic year 2022-2023. Additionally, the child's level of oppositional behavior decreased from high to low.