The concern of this paper is to examine how masculinity is represented and resisted in Ngozi Adichie’s Half of a Yellow Sun. In a patriarchal society, male dominance is more or less a law, while resistance by females becomes a duty. The female gender has been variously constructed and derogatorily represented in male writings, and Adichie in her novel, Half of a Yellow Sun, makes bold to challenge this status quo. She creates female characters who are embodiment of beauty, intelligence, industry and courage. On the contrary, the male characters and their roles in the novel cast aspersion on patriarchal hegemony. Therefore, the characters in the novel suggest that the superiority of one gender over the other is a figment of society. This paper has adopted critical discourse analysis, systemic functional linguistics, and feminist theory in the analysis of the text under study.