Background: Attention deficit / hyperactivity disorder is one of the most common disorders in children. Deficits that caused by this disorder will impact on students at home, school and society. The aim of this study was the comparison between involvement style and effective factors in parental involvement related to learning in students with and without ADHD.

Methods: Research method of present study was causal-comparative. Participants in this study were third-grade of primary school students that 100 (50 normal and 50 ADHD) of theme were selected as sample. Children Raven intelligence scales, family-school questionnaire, effective factors in parental intervention scale, Connor’s scale of parent and teacher forms were used as research tools. To analyze the data, independent t-test and ANOVA were used.

Results: The results showed that parents’ involvement styles of normal students were instrumental and students with ADHD were controlled. The results about gender showed that instrumental and controlling involvement in boys (normal and ADHD) is more than girls (normal and ADHD) (p< 0/01). About effective factors in parental involvement the results showed that except school invitation factor (p>0/05, t= 0/90), all factors average were different between (p< 0/01) parents of normal and ADHD children.

Conclusion: The findings of this study showed that parents of normal students in dealing with children most use instrumental method and parent of students with ADHD used controlling method. The results showed that parents applied both instrumental and controlling methods in relation to boys than to girls. Effective factors in parental involvement except school invited, average of all factors in parents of normal and ADHD students were different.