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In Attention deficit hyperactivity disorder (ADHD), the symptoms of attention deficit, hyperactivity and impulsivity occur and it is thought that this disorder inşuences the school age children at a rate of 3-5% throughout the world. ADHD leads to loss of functioning in cognitive, academic, family and professional areas. Another area impaired in ADHD is social functioning. Impairment in social functionality mostly emerges in the form of refusal by peers and having conşicts with other children and adults. In addition, impairment in social functioning is important for short and long-term unfavorable prognosis of ADHD. 5 year old boy were referred to a child and adolescent psychiatry clinic in 2009 with the symptoms of hyperactivity, temper tantrums, acting as the opposite sex, and impairments in social skills. He was assessed by a semi-structured interview based on DSM-IV criteria, and diagnosed as ADHD-combined subtype. The impairments in social functioning and the treatment modalities between 2009 and 2014 will be discussed in this section. The implementation of interventional programs in the involved areas such as early social skill training for preventing impairment in social functioning may help to alleviate the effect of disorder in adulthood. The efficiency of family training, judicious drug treatment and intervention programs should be increased. In interventions, comorbid disorders as well as ADHD should be taken into account and if necessary, supplementary treatment directed to these disorders should be added to the program.