Caring for primary school children after their school hours has been an important social issue since lots of mothers have taken up their jobs. But the educational policy has been insufficient to support working mothers and their children. Especially, primary schools' children care systems for after-school hours are very poor, while most kindergartens run the whole day care program for working mothers. Therefore, working mothers cannot help depending on private institutes for the management of their children's after-school care. It's hard to expect, however, that children keep their emotional stability like at home as, in most cases, moving a couple of private institutes in a day. The purpose of this study is to search for strategies of caring for children after school hours in primary schools. There are some advantages in school caring system. Children can be in a safe and systemic care in schools. Students also can stay in school and teachers can care for students in connection with their other school lives. To search for the practical strategies based on empirical evidence, I took a survey about actual conditions of after-school children's lives and their parents' concrete needs, and analyzed domestic programs of after-school children caring. The results of the survey show that the parents' expectation for after-school care programs is very high. As a conclusion, I suggest some strategies ― about operating programs, teachers charging the programs, school facilities, and program contents ― to implement after-school care programs in primary schools utilizing extra classrooms.