Childhood obesity is a public health problem in today’s world. Obesity is defined as a disease which has a high impact on school-aged children’s mental health and on the occurrence of numerous psychic disorders. Education and the environment’s positive attitude are the basis for the prevention of obesity. Obese children face many problems in their society (negative stereotypes, prejudice, social isolation and peer violence). Numerous research studies have been conducted on this topic, but in this thesis the emphasis was put on mental health disorders caused by obesity. Objective and purpose of research: to present the parents’ attitudes on the impact which obesity has on the school-aged children’s mental health in the Istria County. Respondents and methods: As many as 100 respondents participated in the research, and they did it via the Facebook group “Mums of Istria Community.” The research instrument was a modified questionnaire made by dr. Vesna Bilić – Kirin. The questionnaire consisted of six demographic questions and 13 statements. Results: There are no significant differences in the parents’ attitudes about school-aged children’s obesity with regard to their professional qualification. The parents’ attitudes are relevant and acceptable in consideration of the perception that obesity is a disease causing both physical and mental disorders, socially unacceptable by peers and causing negative stereotypes and prejudice among young people. Conclusion: The parents’ attitudes to the impact of obesity on school-aged children’s mental health in the Istria County are positive. They perceive and understand the importance of preventing and healing obesity.