It is important for nursery school teachers to have the ability to deliver effective food education to infants and young children. If nursery school teachers themselves do not know healthy food behaviors, they cannot be expected to guide infants in learning good behaviors. In this study, we clarified students’ thoughts on food education with a focus on snacks. A questionnaire survey was distributed to 113 students at Hosen College of Childhood Education, and we performed quantitative and text mining analysis on valid responses. About half of the students were underweight and were considered to be malnourished. Students of normal weight tended to think that eating snacks is a cause of weight gain. Malnourished students tended to think of a snack as a meal, and believed that the purpose of snacks is to satisfy hunger. The students preferred to select chocolates and snack foods for themselves, but they selected fruits, dairy productions, and homemade snacks for infants. The students also selected carbonated drinks for themselves, but they selected healthy drinks like water and barley tea for infants. The students expected that infants enjoy trying a variety of foods through food education. This study suggests that improving their own eating behaviors would help nursery teachers deliver more effective food education.