This article presents the knowledges regarding the evaluation and the management of attention-deficit/hyperactivity disorder (ADHD). Probably the most important components to a comprehensive evaluation of patients with ADHD, are the clinical interview, the medical examination, and the completion and scoring of behavior rating scales. The treatments of ADHD are followings: pharmacologic treatment such as stimulants, atomoxetine, modafinil, and bupropionn, and non-pharmacologic treatment such as parental education/training and cognitivebehavioral treatment