Attention deficit hyperactivity disorder (ADHD) which cause deterioration in functionality, is the most common neuropsychiatric disorder in childhood today. Attention Deficit Hyperactivity Disorder (ADHD), according to DSM-V, is defined with attention deficit, impulsivity and hyperactivity concepts (14). Attention deficit hyperactivity disorder has 3 main subtypes; the character dominated by lack of attention, the character dominated by hyperactivity-impulsive and related 3 more types. It is one of the most seen problems in early childhood and childhood periods. Pre-school children with Attention deficit and hyperactivity disorder (ADHD), difficulties are experienced in diagnostics and education in Turkey. The aim of this study in this context is to discuss the causes, prevalence, treatment and the other related disorders of the character dominated by lack of attention (ADD) in Turkey. Writing was held on the basis of the study is only Attention Deficit Disorder. The conclusion has discussions, personal ideas and some advices.