This research is about sex differences and language use in
writing. The author had read theories that there were differences between male and female in speaking, so the author wanted to know how was in writing. The objective of this study are (1) to know how use of language
by male and language female is especially in writing recount text; (2) to find if there is any difference between male and female in using language in writing recount text; (3) to study why male differs from female in
using language in writing recount text; (4) to observe whether sex difference affect use of language in writing recount text. The problem had been analyzed through comparative qualitative approach that is held in MTs Miftahul Khoirot Ungaran Semarang. The subject of this research was the students of class VIII C of the school. The data was gathered through observation, documentation, and interview. The result of this study showed that there are several differences of male and female students in writing recount text. The differences between them are (1) Most of them (male and female students) had problem about tenses, verb, spelling, linking verb, pronoun and connection; (2) there was a difference between male and
female writing that was topic they used. Male students’ writing was about outdoor activity. Yet, female students’ writing was about indoor activity; (3) there are three factors which affected the differences between male and female in writing recount text. They were (a) Characters; (b) Learning Style; and (c) Social Environment; (4) sex differences affected language use in writing recount text indirectly because there were other factors like their characters, learning style, and social environment.