The aim of this master's thesis research was to examine the quality of dietary habits and physical activity of primary school children. The sample of participants included 111 individuals, and data were collected through an online survey questionnaire published on the social media platform Facebook, within the group Školska zbornica, whose members are parents and predominantly teachers. The study revealed a number of challenges in maintaining a balance between caloric intake and physical activity among school children. According to the obtained data, the majority of children have four meals a day, with an emphasis on nutritional value when preparing meals, but fruits and vegetables are underrepresented in their diets. Despite this, nearly 70% of children are engaged in organized physical activities, but unfortunately, a significant number also spend more time in front of screens than in active outdoor play. Furthermore, the consumption of sweets and snacks continues to pose a challenge in achieving a balanced diet, although parents demonstrate an awareness of limiting sugar intake and fast food. While there is a need for better balance in the intake of various foods to elevate the dietary habits of school-age children beyond the average, parents recognize the importance of healthy eating and physical activity and are aware of the need for changes in dietary habits and a reduction in screen time. It is crucial to continue promoting healthy dietary and lifestyle habits among school children to ensure their healthy development and future.