This study examines how kindergarten teachers should contact specialists and cooperate with specialized institutions in order to support parents of "gray zone" children who have mild developmental disorders to realize their children's schooling. The result of this case study suggests three important points for a teacher in charge of the child to support her/his parents. First, to build a reliable relationship with her/his parents doing feed back of positive appearance. Second, not only to provide the best information to the parents but also to give them initiatives to think by themselves. Third, to support the parents when they are shaken by the difficult decisions related to their children's future course. It is essential that teachers cooperate with specialists to develop specific knowledge and skills. For this purpose, a coordinator of special support education is necessary at kindergarten.