This study examined the longitudinal relation between causal attributions and marital satisfaction and tested rival hypotheses that might account for any longitudinal association found between these variables. Data on attributions for negative partner behaviors, marital satisfaction, depression, and self-esteem were provided by 130 couples at 2 points separated by 12 months. To the extent that spouses made nonbenign attributions for negative partner behavior, their marital satisfaction was lower a year later. This finding was not due to depression, self-esteem, or initial level of marital satisfaction, and also emerged when persons reporting chronic individual or marital disorder were removed. Results support a possible causal relation between attributions and marital satisfaction.