Celiac disease is a small intestinal disease with chronic etiology that appears as an inflammatory reaction due to disorder in immunity response of intestinal mucus on gliadin, a protein component of gluten which is found in wheat, rye, barley and oat. Basic method for a celiac disease treatment is a lifetime gluten-free diet. Preschool institution as an educational institution ensures for every child conditions required to achieve individual needs, possibilities and interests. In order to keep the disease under control, collaboration between parents and teachers is essential. Preschool institution should ensure conditions for children affected by the celiac disease and apart from providing adequate area in the educational institution where child is staying, the utmost attention is given to the kitchen adjustment for preparation of gluten-free meals and education of preschool teachers and kitchen stuff. From medical point of view the disease is in the center of attention and not a child, while psychology and pedagogy teaches us that focus is on the child and not on a disease. Integration is directed on children’s involvement in a regular education system with the aim of recognizing the diversity of each individual and overcoming the prejudices, fears and lack of knowledge through the holistic approach. The aim of this graduate thesis is to identify attitudes, knowledge and competences of the preschool teachers responsible for integration of children with celiac disease into preschool institution. The survey was conducted in April 2018 with involvement of nine kindergartens in Primorje-Gorski Kotar County. Research showed that preschool teachers are aware of celiac disease, that preschool institution has got conditions required for proper integration and that professional development increases competences of educators who are working with children affected by celiac disease.