The purpose of this study is to examine the relationship between care burdens, depression, and suicidal ideation among family caregivers taking care of adults with physical disabilities, and to identify the moderated mediation effects of support services for persons with disabilities on the relationships between care burdens, depression and suicidal ideation among family caregivers. According to survey results, the mediation effects of depression are verified by the relationship between care burdens and suicidal ideation. Furthermore, care services for persons with disabilities have moderated mediation effects on the relationships between care burdens, depression, and suicidal ideation among family caregivers. The negative effects of care burdens are verified by the significant positive relationships between care burdens, depression and suicidal ideation. And the buffering effects of care services for persons with disabilities on the relationships between care burdens, depression, and suicidal ideation are also verified. Based on the results, the practical and policy implications of supporting persons with disabilities and family caregivers are discussed, and developing mental health programs for family caregivers and increasing support services for persons with disabilities and respite services for family caregivers are also suggested.