The increasing number of people who have already been discriminated against in their working lives, as studies show, is problematic for a number of reasons. The profitability of a company suffers (e.g. through lower productivity or high fluctuation) as well as the mental and physical health of the employees and thus ultimately also the working atmosphere. The research question of this paper is "What measures can be taken to prevent age discrimination in the work context?" with the aim, on the one hand, of highlighting the relevance of the topic, since demographic changes show that people are getting older and healthier older, with baby boomers retiring and generations of lower birthrates following. On the other hand, recommendations for action will be developed, especially for employers, but also for employees. By means of literature research in various fields such as personnel management, psychology, sociology, economic and social history, the various manifestations and characteristics of age discrimination are outlined. Subsequently, preventive measures on different levels (social, societal, organizational) are presented, as well as brief approaches to solutions for affected individuals and more detailed possible measures in organizations, such as "age-fair" corporate mission statements, management training and topics such as in-company training for older employees, planned retirement or knowledge transfer are discussed. Finally, a look is taken at future developments and, in the conclusion, also with a focus on the demands of future generations.