Background: Overweight is a common health problem among school children in Sweden and can provide health consequences. The school nurse has a significant role in work with overweight among children and will provide advice on diet and physical activity.Aim: The purpose of this study was to highlight the school nurse's experience of health promotion and prevention for children with overweight. Method: To answer the purpose of the study a qualitative approach was used. Semi structured interviews were used for data collection and a qualitative content analysis with inductive approach was conducted analysing the text. Results: The result precipitated into four categories and one overall theme. The category Overweight identified by estimation and opinion showed the school nurses' experience of identifying overweight in children. The category To identify the child's circumstances before overweight is discussed showed on school nurses experiences of conversations with children about overweight. The category To create awareness among parents supporting cooperation demonstrated on the school nurses' experiences of encounter resistance and motivate cooperation. The category To support the good habits and custom, long-term work showed how school nurses created motivation and good habits of children and parents. The overall theme A work that must be done with tact displayed at the school nurse's feeling that overweight was a sensitive risk of hurting children and parents. Conclusion: Work with overweight in children can be a challenge because it is a sensitive topic associated with much guilt and shame. School nurses talking with the child about overweight, depending on the child's age and maturity. When the nurses inform parents about child overweight, they meet resistance. The school nurse works with overweight by motivating the change of the healthy habits