抄録
The purpose of this study is to investigate the relationship between the opportunity of extra hours for child care in preschool and the burden of child-rearing, and the characteristics of the mothers who use them The questioner made it clear that mothers who already use the opportunity of extra hours or who hope to use this resource feel more strongly the burden of child-rearing than mothers who do not use it. When preschool children have older siblings, their mothers tend to use the extra hours. On the other hand, those who are living with grandparents do not tend to use them. Mothers who use the opportunity of extra hours are likely to use more places to leave their children besides preschools. It was discussed how these extra hours should take a necessary role as a part of child-rearing support network.