Objective: Attention deficit/hyperactivity disorder (ADHD) is one of the most common psychiatric disorders in childhood. One of the effective therapies for ADHD is positive parenting program (Triple-P) mixed with medication. The purpose was to determine the effectiveness of group training positive parenting program on ADHD symptoms of 4-10 years old children.

Materials & Methods: In this pre-experimental study, pre-test and post-test design with single group used and 25 mothers of ADHD children who had attended in Akhavan and Rofeide Clinics selected in convenience. They participated in 8 sessions (one session, 2 hours weekly) and trained with positive parenting program. Mothers completed Conner’s Parents Rating Scale Revised before and after training sessions. Data analyzed by using one-way analysis of variance with repeated measures and Bonfroni post-hoc test.

Results: one- way analysis of variance with repeated measures showed that group training positive parenting program has led to significant reduction (P<0. 001) in ADHD index, hyperactivity, oppositional behaviors, cognitive and attention problems in ADHD children. Post-hoc Bonfroni test indicated that there is significant differences (P<0. 05) between the means of hyperactivity with oppositional behaviors and cognitive and attention problems, hyperactivity/attention deficit index with oppositional behavior, cognitive and attention problems with hyperactivity respectively. But, there is no significant difference between the means of cognitive and attention problems with oppositional behavior.

Conclusion: Group training positive parenting program lead to improvement of ADHD symptoms and it causes positive outcomes in combination with medication.