The benefits of living a conscientious life have been demonstrated across multiple domains, and yet, few studies have sought to explain how the positive effects in one area may help explain those in another. The current article considers the possibility that conscientious individuals live healthier lives by virtue of having greater success in their relationships. Using both past research and new findings to support our model, we set forth a framework by which to consider how Conscientiousness affects relationship functioning, which in turn leads to better physical, emotional, and psychological health. In so doing, we also provide a new outlook on the health benefits associated with Conscientiousness, and how these may be conferred by relationship success.