Purpose: The study aims to examine job satisfaction of migrant live-in home care workers who provide care to frail older adults and to examine the extent to which quality of relationships between the care provider and care recipient and workplace characteristics is associated with job satisfaction. Design and Methods: A convenience sample that included 335 dyads of Philippine workers and their frail care recipients were recruited through 2 national home care agencies and snowballing. Multiple regression analyses examined the extent to which workplace characteristics, quality of relationships, care recipient characteristics, and care worker characteristics explain job satisfaction. Results: Scores for job satisfaction, quality of relationships, and workplace characteristics were strongly positive. Overall and intrinsic job satisfactions were explained by workers' qualifications, workplace characteristics, and quality of relationships from the perspective of care recipients, whereas satisfaction with benefits was affected by workplace characteristics and quality of relationships from the perspective of the care workers. Implications: Findings suggest that workers who were better qualified in terms of more years of formal education and more years as care workers and who reported improved workplace characteristics, in particular more job decision authority and variety, reported increased job satisfaction. Therefore, enabling migrant live-in care workers more job decision authority and variety may increase their job satisfaction. More research is needed to deepen our understanding of additional job-related characteristics that explain job satisfaction among this group of care workers.