Although Attention-Deficit and Hyperactivity Disorder (ADHD) is known as a neurodevelopmental disorder with cognitive and executive dysfunctions, social dysfunctions are seen in children and adolescents with ADHD. Lower 2D: 4D finger ratio is associated with ADHD. In this study, we aimed to determinate the relationship between aggression, empathy and 2D:4D ratio, in male children and adolescents with ADHD.