Objective: This study investigated the relationship between motor performance; attentional, hyperactive, and impulsive symptoms; and social problems. Correlations between parents’ versus teachers’ ratings of social problems and ADHD symptomatology were also examined. Method: A total of 129 children aged 9 to 12 years were included. ADHD symptoms and social problems were identified based on Conners’ Rating Scales–Revised: L, and the McCarron Assessment of Neuromuscular Development was used to assess motor skills. Results: After controlling for ADHD symptomatology, motor skills remained a significant predictor of social problems in the teacher model but not in the parent model. After controlling for motor skills, inattentive (not hyperactive-impulsive) symptoms were a significant predictor of social problems in the parent model, whereas hyperactive-impulsive (not inattentive) symptoms were a significant predictor of social problems in the teacher model. Conclusion: The findings suggested that intervention strategies should consider the interaction between symptoms and environmental contexts.