Objective: To determine frequency of motor alterations in children with attention deficit hyperactivity disorder (ADHD). Method: We evaluated 19 children aged 7-12 years with ADHD classified in three sub-types: Combined (ADHD-C), with Inattention (ADHD-I), and with Hyperactivity (ADHD-H). Controls were age-and gender matched healthy children. We utilized Bruininks-Oseretsky Test of Motor Proficiency (BOTMP) for measuring motor skills. Results: We observed differences between children with ADHD and controls in BOTMP general score and in static coordination, dynamic general-and hand-coordination, and in synkinetic movements. We also found differences in dynamic hand coordination between controls and children with ADHD-C; in dynamic general coordination between controls and children with ADHD-H; and in frequency of synkinetic movements between controls and children with ADHD-H. Conclusion: Children with ADHD with a major degree of hyperactivity showed greater frequency of motor alterations.