The purpose of this paper is to investigate the reasons for lack of social skills in students with ADHD and the negative consequences of the deficit in social skills on students' development. Due to symptoms of Attention Deficit/Hyperactivity Disorder such as inattention, impulsivity and hyperactivity, students are very often misunderstood and rejected by peers, which affects self-confidence and progress in social development. Students often become victims of peer violence or abuse others, enter a group of peers at risk, which are often delinquents and more prone to risky behaviors. Failure in social interactions continues into adolescence. Precisely because of the seriousness of the consequences caused by the deficit of social skills and because of quality inclusion for students, it is necessary to develop activities and strategies for the development of social skills such as learning self-control, making and maintaining friends and taking care of yourself and others. In order for activities to be more effective, they need to be carried out systematically and in the long term. Teachers need to be educated for inclusive education, and parental and peer support is key for carrying out activities.