This study examined academic achievement of children in female marriage immigrant families (MIF) and children in general families (GF). Subjects were 78 MIF and 82 GF children recruited from Chungcheong and Jeolla provinces. Academic achievement was determined by questionnaires completed by their teachers; intelligence was measured with standardized intelligence tests. Data were analyzed by two-way ANOVA and ANCOVA. Results showed that (1) academic achievement of MIF children was lower than that of GF children in overall academic achievement and individual subject achievement. (2) The difference in academic achievement between the two groups remained after controlling for intelligence. Results of this study illustrate the urgent need for supportive policy to enhance the academic achievement of MIF children.