The stereotypical gender traits used in self-descriptions could contribute to shape ambivalent sexist attitudes toward women, including antipathy toward women who appear to threaten the gender hierarchy (i.e., hostile sexist attitudes) and affection for women who embrace traditional feminine roles (i.e., benevolent sexism). Empirical evidence associates more stereotypically feminine traits with benevolent sexism and masculine traits with hostile sexism but does not offer a clear picture, likely because of the non-controlled effect of social desirability and other gender traits in those relationships. We examine whether self-ascribed masculine traits moderate the modulating influence of social desirability in the linkage between feminine traits and benevolent sexism, and whether self-ascribed feminine traits moderate the modulating effect of social desirability in the association between masculine traits and hostile sexist attitudes. Results reveal that stereotypical gender traits and social desirability are connected to benevolent and hostile sexism, although differently. The gendered profile of those with benevolent attitudes (i.e., participants who self-attribute largely feminine traits) is different from those with hostile attitudes (i.e., participants who self-ascribe mainly masculine traits). In addition, the need to gain others’ approval or, more importantly, to avoid their disapproval, leads individuals to offer more socially desirable responses that mask their hostility toward women, whereas this need is less evident when hiding benevolent attitudes. As benevolent sexism is more pervasive in society and, unlike hostile sexism, is not easily recognized as a type of prejudice, it is harder to counteract and, therefore, to eliminate.