The problem of childhood obesity is accelerating throughout the world. Korea is no longer an exception to this problem. The following topics are discussed in this review article: 1) the linkage between childhood obesity and adult obesity, which is often associated with metabolic diseases such as type2 diabetes, hypertension, cardiovascular diseases, and certain cancers; 2) characteristics of childhood obesity; 3) measurement of obesity and its unique problem; 4) recent trends in interventions for childhood obesity. Lastly, the author points out that nurses are best suited for carrying out interventions to prevent obesity in childhood. As childhood obesity is a risk factor for persistence of obesity into adulthood, the need to consider the priority of prevention of obesity during childhood is emphasized in this review.