Attention-deficit/hyperactivity disorder (ADHD) is one of the most common mental disorders in the childhood. It's a persistent and severe impairment of psychological development resulting from a high level of inattentive, hyperactive and impulsive behaviour and puts sufferers at risk for a range of abnormalities in different areas of development as well as comorbid mental disorders. The adverse outcomes include dysfunction in familiy relations. ADHD likely involves both genetic and environmental etiologies. Treatments most frequently used are medication, neurofeedback, family interventions and family therapy. The review of recent scientific literature refering dynamics in families with ADHD children and family relations based treatments may propose relational family therapy as one of the possible interventions.