Asthma is a reversible obstructive disease of small and large airways with varying intensity of obstruction that passes spontaneously or in response to therapy. It represents the leading chronic disease of children in most industrialized countries and it is one of the most common causes of hospitalization of school children. The aim of this study is to determine the prospective analysis of the level of parental knowledge about the illness of their children, acquired during training on timely recognition of early signs of disease deterioration, selfhelp and self-control of pulmonary function (PEFR). In this research we recognize their knowledge after general education on asthma awareness, also recognize objective indicators of disease control as well as on quality of education. The research was conducted at the Pediatric Clinic of the Sestre milosrdnice University Hospital Center through a survey questionnaire that was compiled and tailored to this research. The results of this research show that parents have great knowledge about general and objective asthma indicators and thus have good control of their child's illness. This confirms that the education implemented at the Clinic is quality and constructive. A nurse has an important role in a medical team that treats and supervises a child with asthma. During hospitalization after asthma diagnosis or during ambulatory care, a nurse teaches parents and children. The aim of each education is to have the parent and child acquire the knowledge of asthma as a chronic illness characterized by deterioration, recognition of triggers and their control and self-help in asthma exacerbation. Good parenting and child education affects directly the control of the disease. Education should be tailored to the age of the child, the level of education of parents and children and their customs and socioeconomic circumstances. Education can be performed individually or in group but in the case of children with poorly controlled asthma, re-education should be carried out. In the prevention of asthma exacerbation, the awareness of the parents of the affected child is of great importance, and by teamwork and education, the number of asthma exacerbations can be reduced and the child can live without worry and quality. It is very important to build a constructive relationship between a parent, a child and a team of healthcare professionals involved in treating a child with asthma.