**Abstract**

In recent years, academics have increasingly emphasized the importance of research into the well-being of children and adolescents. This is because well-being plays an important role in the development of children and adolescents. The literature reports that high levels of well-being facilitate positive functioning in children and adolescents. They contribute to the overall development of the individual and are a key factor in helping children and adolescents to integrate into society. ADHD, the most prevalent neurodevelopmental disorder, affects more than 5% of children and adolescents, and the distress caused by its symptom can seriously undermine the well-being of children and adolescents. Therefore, this chapter discusses this noticeable issue focusing on the following key parts: An understanding of the well-being in children and adolescents, the factors that affect the well-being of children and adolescents with ADHD, and how to improve the well-being of children and adolescents with ADHD.

**Keywords:** well-being, child and adolescent, ADHD, factors
