Objectives: Family caregivers raising children with severe motor and intellectual disabilities (SMID) experience the enormous burden of care.The concept of family empowerment is one of the important assessment indexes of family nursing from the perspective of providing comprehensive support for these families.The objective of this study was to identify the factors associated with the empowerment of families raising a child with SMID in Japan.Methods: We conducted a nationwide questionnaire survey involving 1659 primary caregivers raising a child with SMID through 89 special schools.We assessed the main outcomes using the Family Empowerment Scale (FES).We then conducted a multiple linear regression analysis to reveal the factors associated with family empowerment.Results: In total,1362 primary caregivers were included in our study.Our results show that factors contributing to high FES scores are higher age of the primary caregiver,higher education,greater recognition of regional support,lower childcare burden,higher utilization of home visit services,higher usage of a childcare institution,higher household income,and stronger family bonding.Conclusion: Healthcare professionals should carefully assess the state of family empowerment of the primary caregivers who are younger and those who have low education,low household income,high childcare burden,and fragile bonding with the family.Second,they should encourage such families to use regional support resources for childcare.That is,policy makers should consider ways to promote home visits and institutional services for the care of children with SMID,aiming especially for the provision of well-coordinated care and services.