This longitudinal study was motivated by cross-sectional, clinical, and survey research on marital relationships and individual well-being. Perceptions of husbands' behavior toward themselves and self-reports of demoralization were collected from 51 low-income women during their children's kindergarten year and 3 years later. Longitudinal correlations of specific components and aggregated scores of perceptions of husbands' behavior and of demoralization revealed significant stability. Both initial and later marital relationship scores had higher correlations with later than with initial demoralization scores. Longitudinal correlations and multiple regression analysis supported the hypothesis that initial marital relationship would predict later demoralization. Quality of perceived marital relationship apparently has different immediate and long-term effects on components of individual adjustment. Integrated longitudinal studies of relationships and personality and their intercorrelations are needed to understand stability and change in adult personality and well-being.