Prejudice has been a long-lasty issue in our society. Although it is not essentially harmful, it can lead to various forms of antipathy conduct such as talking against people, discriminating, or attacking them with violence. This study intends to investigate the problem of prejudice towards African portrayed in the Heart of Darkness novel. The objective of this study is identify the kinds of hostile action of prejudice towards African. In order to investigate the problem of prejudice, this study applied Gordon Allport’s acting out prejudice and traits of prejudice victimization theory. The data were in the form of narration and dialogue, while the data source was only taken from the novel itself. The result of this study showed that African in the Heart of Darkness novel portrayed to experience three kinds hostile action of prejudice, namely: antilocution, discrimination, and physical attack. As for African’ responses towards prejudice, it showed that intropunitive was the most dominant trait portrayed in the novel. Key words: Prejudice, Antilocution, Trait of Prejudice Victimization, Extrapunitive, Intropunitive