The theoretical part of the thesis includes the explanation of ADHD disorder's nature, three different types of ADHD and the symptoms which are characterizing it, the procedure of diagnosis and types of possible therapies which is recommended to persons diagnosed with ADHD. Considering the fact that people with ADHD disorder have difficulties in everyday life in various surroundings, this text constitutes about their functioning in family and school environment and their interaction with their peers. The empiric part of this text presents the results of the research done in June 2018. 288 students from forth, sixth and eighth grade have been tested, from elementary schools Jordanovac and Remete in Zagreb. For the needs of this research, a questionnaire was prepared with which the students awareness of the term ADHD was tested, but as well as the behaviors that is typical for this disorder including the opinions and attitudes of the students towards ADHD. The result shows that students are partially familiar with the term ADHD and that they recognize few of the characteristic behaviors for this disorder. Also the students have shown high empathy and understanding towards ADHD diagnosed children. Totality of the received results is the result of the fact that most of them are meeting and interacting with children that are diagnosed with this disorder every day.