This study analyzes changes in paternal care toward a father’s own child through participation in a cooperative child care center or cooperative after school club. Fathers have relationships with men in such cooperatives and these male relationships usually encourage fathers to care for their child and to take pride in performing their paternal duty well. Even though fathers usually join such child care organizations passively, they perform ‘domestic work’ and ‘care-related housework’ after participation in child care cooperatives. In addition, fathers care for other children as well as their own child in cooperative settings based on socially extended fatherhood. They exhibit ‘reflexive care’ (care-giver reflects social structures based on private care experience). Therefore paternal care for children are reconstructed through cooperative child care centers and after school clubs.