Depression is a serious mental disorder to which we must pay attention. It is a real illness that can be treated. Depression can affect anyone, regardless of gender or age. It requires medical treatment because it affects at the entire human life, and if it' not treated, it gets worse and worse. This is why it is necessary to react in time. Due to ignorance of the depression and it's symptoms, it is often not recognized by the people who suffer from it, as well as their surroundings. Depression causes significant family, professional and social difficulties. Depression has become a very common disorder in children and adolescents. Depressed child's ability to function or perform their compulsory education. Depression in children has a significant effect on their cognitive, social and physical skills. A depressed person can not function normally or carry out with his life responsibilities. In the depression is very important that the person or a child who is suffering from depression is not alone. Depression is an illness with significant mortality rate. The data suggest that up to 15% of depressed people commit suicide. Therefore depression requires a serious approach, early recognition and adequate treatment to avoid possible fatal consequences. According to research conducted at the University Jurja Dobrile in Pula, we can say that students of teacher training studies, future teachers are very well educated about the depression, its recognition, the approach and the right treatment of depression.