Background: The growing elderly population presents challenges in maintaining quality of life, particularly regarding family support and caregiving. Family function, family roles, and family support may influence healthcare practices and well-being among older adults. This study analyzed a family role model for improving the quality of life of older adults in Kediri City, Indonesia. Methods: A cross-sectional study was conducted among 420 families with elderly members selected from nine community health centers using Probability Proportional to Size Sampling. Data were collected through structured interviews using the APGAR Family, PSS-Fa, and WHOQOL-OLD instruments and analyzed using Structural Equation Modeling–Partial Least Squares (SEM-PLS). Results: Most older adults were female (65.7%), aged 60–74 years (78.8%), and widowed (52.9%). Family characteristics significantly influenced family function (β=0.217; p=0.003), while family function influenced family roles (β=0.449; p<0.001). Family roles significantly affected family support (β=0.377; p<0.001), elderly healthcare (β=0.725; p<0.001), and quality of life (β=0.269; p=0.001). Family support (β=0.151; p=0.008) and elderly characteristics (β=0.105; p=0.016) also positively influenced quality of life. Conclusion: Family function and family roles are key determinants of quality of life among older adults. Strengthening family-centered caregiving and psychosocial support may enhance healthy aging and well-being.