The purpose of this study is to analyze dialogues in order to detect the dominant features of gender inequalities in Korean middle school English textbooks. The analysis is restricted to three best selling middle school English textbooks designed to teach the first grade students. The results of the study are as follows: First, the frequency rate of sentence utterances shows that males produce 58 sentences whereas females produce 50 sentences. In the analysis of the rate of the first initiator of the dialogue, the rate of males is higher than that of females. Second, the distribution of male and female characters in the dialogues indicates that male and female characters are almost equally distributed in the dialogues. Third, gender of characters is closely related to the situation and place of utterances. In the case of men, these utterances mainly happen in so-called social places such as working place, school, post office, street, etc. On the other hand, women speak mostly inside of the house, which reflects the traditional gender roles. Also, a detailed analysis of 3 dialogue types is included in this paper.