This study tries to examine the relationship of acculturation stress perceived by married immigrant women with marital conflict. The participants of the study are 141 married immigrant women from China, the Philippines, Japan, and Vietnam who have resided in Korea after marriage. The results show that all domains of marital conflict were positively related to all sub-factors of acculturation stress. In addition, multiple regression results indicate that after controlling for the effect of age, husband`s education level, family income, and marriage duration, perceived discrimination factor of acculturation stress was the most powerful variable influencing marital conflict. Finally, some implications are suggested for researchers and practitioners working with these women.