The aim of this research is to form of the model on process of creative thinking. A viewpoint of creative thinking is risen quality of mathematical thinking by all member of the class. The model on process of creative thinking is formed by these precede studies: The process model of understanding mathematics for building a two axes process model by KOYAMA, Episode analysis by Schoenfeld, Through the recursive eye mathematical understanding as a dynamic phenomenon by Pirie & Kieren. This model has horizontal axe that means progress of time. And vertical axe means eight level of subject of mathematical thinking's quality. I insist that when The present episode changes next episode, discussion by all member of the class has some children's question. And therefore I built the model that we can write situation of episode movement by children's question. The main results on this study are followings; 1) The quality of creative thinking and the subject of creative thinking were become higher than before discussion by all member of the class. 2) From this case study, children's question is driving force that creative thinking of children is more high quality.
