Introduction. The WHO defines health as total physical, mental, and social well-being. The implementation of healthy habits in childhood is crucial to the future health and well-being of the individual and society. The adolescence period is particularly important because it shapes lifelong health habits that we nurture as adults. Aim. The aim of this study is to analyze and compare the health behavior of pupils in grades 5–8 of elementary school, and their parents. Methods and materials. The study involved 250 pupils in grades 5–8 and 242 parents of adolescents included in the study. The standardized questionnaire “Health Behavior Inventory” was used to survey the parents. A modified version of the questionnaire was used to survey the adolescents. Results and conclusion. The study showed that the parents’ group was characterized by a medium level of health behavior, while the adolescent group was characterized by a low level. Adolescents showed lower health behaviors than their parents. Women presented higher scores on proper eating habits and preventive behaviors compared to men. Girls showed higher scores on health practices than boys. BMI and parental education did not affect the level of health behaviors in the surveyed parents. The main source of information on health behaviors for adolescents is the family. It is necessary to expand the knowledge of children and adolescents’ positive health behavior, including modern medical applications and information in social media. It is necessary to pay attention to the special role of the family in children’s health education.