fa کاردرمانی Occupational Therapy پژوهشي Research <strong>Background and Objectives: </strong>The present study was conducted to determine the effect of a family-based sensory diet program on children with attention-deficit/hyperactivity disorder (ADHD). In this program, parents were directed to use activities stimulating the vestibular, deep, tactile, visual, and auditory senses to maintain the children&rsquo;s focus and organized consciousness.<br> <strong>Methods:</strong> This research was a quasi-experimental study with a Pretest-Posttest design with an experimental group. Wechsler Intelligence Scale for Children (WISC-IV) and Conners&rsquo; parent rating scale were used to measure the study variables. The study&rsquo;s statistical population included all children with ADHD aged 6-12 years referred to Hasti, Bahar, and Masir-e Sabz health clinics in 2020. Of them, 30 participants were selected through a convenience sampling method.&nbsp;<br> <strong>Results:</strong> Based on the analysis of covariance (ANCOVA), the obtained F values of attention deficit and hyperactivity were significant at a level less than 0.05. So the test hypothesis is accepted, and family-based sensory diet sessions effectively reduce ADHD symptoms in these children.<br> <strong>Conclusion:</strong> According to the findings and the degree of effectiveness, implementing the sensory diet program by the child&rsquo;s family can effectively reduce ADHD symptoms.&nbsp;<br> &nbsp; Family-based sensory diet, Attention deficit, Hyperactivity 0 0 http://fdj.iums.ac.ir/browse.php?a_code=A-10-207-2&slc_lang=fa&sid=1 Shila Shabdini shilashabdini26@yahoo.com 10031947532846002398 10031947532846002398 Yes Department of Psychology and Education of Exceptional Children, Faculty of Literature, Humanities and Social Sciences, Science and Research Branch, Islamic Azad University, Tehran, Iran. Mohammad Parsa Azizi 10031947532846002399 10031947532846002399 No Department of Psychology and Education of Exceptional Children, Faculty of Literature, Humanities and Social Sciences, Science and Research Branch, Islamic Azad University, Tehran, Iran. Javid Peymani 10031947532846002400 10031947532846002400 No Department of Psychology and Education of Exceptional Children, Faculty of Literature, Humanities and Social Sciences, Science and Research Branch, Islamic Azad University, Tehran, Iran.