Attention-Deficit Hyperactivity Disorder (ADHD) is characterized by two groups of symptoms: inattention and hyperactivity-impulsivity. This disorder can continue into adolescence and is at risk for behavior disorders, substance abuse, and the risk of juvenile delinquency or offending. A perinatally factor that is often associated with ADHD is birth weight. Analyzing the relationship between birth weight and the risk of ADHD in children >36 months as assessed by the Abbreviated Conners Rating Scale (ACRS) instrument. The sample consisted of 30 children who met the inclusion criteria. Interviews are conducted by using the ACRS instrument with the parents or closest caregivers of the child and asking about the child's birth weight. This research was approved by the Ethics Committee of Dr. Soetomo Hospital Surabaya, Indonesia. The mean age of children at risk for ADHD was 4.85±1.47 years. More men were diagnosed than women, but no statistical significance with p = 0.317 (significant if p<0.05). Bivariate analysis using Pearson's correlation found a significant negative relationship (r = -0.405; p = 0.026) between birth weight and the risk of ADHD. There was a negative correlation between birth weight and the risk of ADHD.