The purpose of this study was to investigate the relationship between wive"s sex-role attitude and their marital satisfaction for understanding a part of marital relations. For this purpose, a questionnaire was constructed and administrated to 626 married women. the sex role attitude scale was a modified version of the sex-role attitude scale constructed by Osmond and Martin, and the marital satisfaction scale was developed basing upon the scales used by Terman and Hayes & Stinnett. The result of this study are summarized as follows; The majority of wives have relatively modem attitude toward their sex role in the extra familial roles. Wives have relatively modem attitude toward their sex role when the couples are younger, more educated, on a higher income level and working or a job (especially or a professional job). Wife"s education level, husband"s education level and family income make significant difference in their marital satisfaction specifically, a wife would be relatively more satisfied when she has more education and the family income level is higher. It is founded that wives sex role attitude has significant relationship with their marital satisfaction. A wife tends to be more satisfied when she has a traditional sex role attitude . A professional wife who has a traditional attitude shows most satisfaction and one who has a modern attitude and not having a job tends to be most dissatisfied with her marriage. It is also founded that a wife who has traditional attitude and received college education are above shows most satisfaction while the wife who has modern attitude and received high school education or below shows most dissatisfaction with their marriage lives.