The components and determinants of HIV/AIDS stigma and prejudice were investigated in an online-questionnaire study. The results show that the components of the attitude toward people with HIV/AIDS consist of social distance, demands for political measures, negative stereotypes, and attribution of responsibility to people living with HIV/AIDS. Besides antigay attitudes and false beliefs about ways of infection, the HIV/AIDS attitude is connected to and depends on social dominance orientation (SDO) and right-wing authoritarianism (RWA). Structural equation modeling indicated that antigay attitudes and false beliefs function as mediator variables for SDO and RWA. Implications of the results are discussed.