The purpose of this study is to investigate how much of a percentage of the person who feels resistant against a child exist and to look into the cause of the feeling. This study was carried out in order to obtain knowledge for experiential learning in early childhood education and care. This study was based on a survey of 241 university students and graduate students. It examined the feeling about a child, the opinion about association with a child and “tolerance of ambiguity”. These investigations indicated that 17.5％ of the person who thought a child lovely felt resistant against association with a child. Furthermore, it was observed that they had their ideals that adults should enjoy association with a child but they predicted that the beliefs could not come true. Moreover, based on our research, the person who had little tolerance of ambiguity tended to feel resistant against a child, even if he thought a child lovely. These results suggest that the activity that suppress ambiguity such as the observation how the children behave, is necessary to reduce ambiguity before free play with a child.