Obesity is an international as well as a national problem. In Sweden one of five four-year-olds are obese. Child health care nurses work from both a population perspective and a family perspective. The child health care centre is an arena that can make different to the obesity problem in society, by offering support to parents of children at risk for obesity or with diagnosed obesity. The purpose of the study is to describe the child health care nurses clinical practice with parents of children who are obese. The study has a qualitative approach with interviews and deductive content analysis. Five child health care nurses have been interviewed. Olander's theory of clinical practice is the reference of the deductive content analysis. The result shows that the child health care nurses are aware of their two missions. Their population mission is based on the national guidelines of child health care. However, their family mission seems to be prominent. This as the child health care nurses strive to work in an individualized manner to identify the needs of each family to determine on how to invite parents to participate and how to communicate with parents about their child’s obesity.