Background: The school nurse and the student health service have a fundamental mission to promote students health to enforce school performance. Students with attention deficit without hyperactivity can be difficult to detect as the pupil does not disturb others but find it difficult to follow the education. Students with these disabilities are experiencing varied support from the school which can have a negative impact on academic performance and self-esteem. Aim: To describe school nurses experience of how to support students with ADD. Method: An empirical interview study was conducted using semi-structured questions asked to nine school nurses working in elementary and secondary schools. A qualitative content analysis was used for the analysis of the collected data. Result: Three categories emerged from the result: "To be there for the student", "To interact in the school health team", and "To act as an informative link". An overall theme emerged as "Support built on knowledge and understanding”. Conclusion: The school nurse supports students with ADD by working health promoting through being available, be responsive to student needs and by lifting student needs to the school health team. He/she also works as a collaborative link between all participants to follow up the support over time. However it requires some knowledge about ADD to be able to provide support for these students.