Introduction: For decreasing symptoms and outcomes of attention deficit hyperactivity disorder (ADHD), various treatments were proposed. Such the evidence based treatments, is parent training. Barkley’s Parent Training Program (BPTP) is one of the interventions that have been specifically provided for children with ADHD. Goals: The aim of the current study was to examine effectiveness of Barkley’s parenttraining program on decrease of clinical symptoms in children with ADHD. Method: 36 participants with ADHD (aged between 6 to 12 years), were selected by convenience sampling method. SNAP–IV, Child Behavior Checklist (CBCL), and clinical interview, were used for diagnosis and determine of intensity of symptoms. Research data were analyzed by dependent ttest. Findings: It is indicated that Barkley’s parent training program (BPTP) resulted a reduction of symptoms in SNAP-IV and CBCL tests. This reduction in SNAP-IV’s variables (hyper activity / impulsivity and combination of symptoms), was significant. Also attention problems (scales based on experience) in the CBCL was significant. Conclusion: The present results are consistent with other research that parents of ADHD children are supported to reduce problems. Also, this particular study focuses on the efficacy of parent training as a new approach.

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