This article presents the results of a study into stereotyping by managers of their older workers and the influence of these stereotypes on the inclination of managers to keep their older workers in employment. The data for the study were gathered among 796 managers. Through principal components analysis, 15 opinions about older workers were reduced to three dimensions of stereotypes. The first dimension deals with the productivity of older staff; the other two dimensions have to do with their reliability and their adaptability. These stereotypical ideas about older workers influence managers' attitudes toward the retirement of their employees. The analyses show that, besides organizational factors, psychological mechanisms also explain why people view older workers through stereotypes. Managers who are older and in more frequent contact with older employees tend to hold more positive views.