Literature has often connected the variables of physical health, mental health, and romantic relationship satisfaction or quality. However, there has yet been any evidence of a mediating relationship. The purpose of this study is to test for mediation of satisfaction with daily marital interactions on physical symptoms through psychological distress. The data is from the Life and Family Legacies Daily Experiences Study and includes 191 older couples over the course of 14 days. Multilevel dyadic models were estimated for both the same-day data as well as lagged data. Indirect effects between the variables were significant, but not for the lagged data. Effectively managing symptoms to enhance mental health may improve daily marital satisfaction for older adults.