Ambivalent sexism theory suggests that there are two forms of sexism : hostile sexism toward non-traditional women and benevolent sexism toward traditional women. Based on the finding that the threat to self motivates self-affirmation, which leads to stereotyping and prejudice, this study investigated how that threat had an impact on the two above-mentioned forms of prejudice toward women. In study 1, it was predicted that, under the threat, hostile sexists among the male participants were less likely than the nonsexist male participants to evaluate a career-woman favorably on a warmth dimension. This hypothesis was supported. In study 2, it was predicted that, under the threat, the benevolent sexists among the male and female participants were more likely than the nonsexist participants to evaluate a homemaker-oriented woman favorably. On the contrary, when the less benevolent sexist male and female participants felt threatened, they were less likely than the sexist participants to evaluate the women favorably on a warmth dimension. The possibility that the way of expressing gender-prejudiced attitudes became diversified was discussed.