Background: In the last few decades, industrialization, urbanization, economic development and market globalization have had a significant impact on changes in lifestyle and diet. Thus, food choices and nutritional intake greatly affect oral health and body weight. This has a significant impact on health and nutrition, particularly through higher carbohydrate intake and lower physical activity, particularly among younger members of the population. High sugar intake, such as sugar-containing snacks and soft drinks, was reported it is more common in children/adolescents who are overweight and obesity than those of normal weight. Frequent sugar intake is also a risk factor for dental caries. Given this, there is strong evidence that supports the relationship between dental caries and dietary intake has been associated with the development of obesity at a young age. Thus, it is possible to conclude that there is a biological relationship between dental caries and body weight. Objective: To see the relationship between body mass index and dental caries in children. Methods: Scientific evidence and clinical cases were drawn from the literature to support this review and information on the relationship between body mass index and dental caries in children. Result/Discussion: There is some scientific evidence showing a specific relationship between body mass index and dental caries in children. Conclusion:Body mass index has a significantrelationshipwiththeincidenceof dental caries in children. However, thisconditiondoes not account for which category the incidence of dental cariesis greatest. This is associated with multifactorial interactions that mutually influence the occurrence of dental caries in children.