Background: How small children sleep influence the whole family. Sleeping problems, could influence children physical, mental, emotionally, cognitive and socially. When parents get waked by the children, who wake by themselves in the middle of the night, the parents do not always now what to do. Aim: The aim of this study was how children sleep and how it influence their parents sleep habit. The question formulation was threefold: Firstly. To describe the sleeping habit of children aged 0-3 years and their parents. Secondly, how usual are sleeping problems and which are the differences concerning sleep between those who experience problems and those who do not? Thirdly, witch help has the parents searched and received concerning sleeping problems. Method: The study was empirical and a questionnaire was constructed. This was delivered to three children care centres. 51 questionnaires were answered and analysed. Results: The parents who believed that they sometimes had problem with the sleep, felt more irascible. They also believed that the children were more frequently sick. The parents talked more with district nurse, and they had more frequently at least two children.