The following study investigates the impact of health on intimate relationships. In a three year longitudinal study, physical and psychological well-being were used as predictors of the relationship evolution of 70 non-clinical couples after three years. The results revealed that psychological health was a better predictor than was physical well being among the men in the study, while both health measurements proved to be relevant predictors among the female subjects. What is more, the women in the study were more strongly influenced by the health of their partners than were the men. However, the psychological well-being of both partners was significantly correlated to the relationship satisfaction of both sexes. In addition, the effects of the psychological and physical well-being of both partners at the end of three years were considerably greater than were those taken during the initial measurement period. The results of this study raise the question as to whether a causal relationship between health status and the relationship of a couple does. in fact, exist. Although evidence concerning such a causality was found, these results, nevertheless, require further critical discussion.