Purpose: A person’s health is of great value. The study aims to analyse the expediency of implementing the system of physical training and health improving means and their effectiveness in the development of health maintaining competence of preschool children. Material: A sample of educators and preschool children from the educational institutions of Lviv (Ukraine) participated in the study. We used such methods of data collection as: the regulatory and legal documents analysis method, the observation method, the survey by questionnaire ‘Is your child a healthy one?’ method. Results: The ability of preschool children to treat their own health consciously will guarantee the effectiveness of their health maintaining competence development. Conclusions: The system of measures aimed at developing preschool children health maintaining competence will be effective, provided that their consciousness has been developed.