Background: Attention Deficit/Hyperactivity Disorder (ADHD) is one of the most communal disorders that affects not only children but also adolescents, Parents having affected children with ADHD experience significant parenting stress more than other parents, Aim: the study was aimed to evaluate the effect of behavioral training program on stress among parents of children with attention deficits hyperactivity disorder Design: A randomized control trial research design was utilized in this study. Subjects: A convenient sample of parents having child with ADHD (50) Setting: Data were collected from the out-patient clinic department at Helwan hospital for psychiatry and mental health & Bet -El shams clinic for Abbasia hospital for psychiatric disorder and Addiction. Tools: two tools were used for data collection (1): Socio-demographic data sheet, which included (a) Demographic data related to parent, (b) Demographic data of child, (2): parenteral stress scale. Results: current study showed that statistically significant differences were found between study and control groups at post behavioral training program regarding parenting stress, Conclusion: The behavioral training program has a successful effect in reducing stress among Parents of children with ADHD. Recommendation: Facilitating access to behavioral training programs in psychiatric hospitals and out-patient clinics and to integrate this intervention into the regular treatment plans for Parents of child with ADHD.