Today, globalization is becoming more and more widespread and important in almost all areas in the social, economic and political spheres. In most cases, it is globalization that brings diversity to everyday life. This diversity is gradually penetrating into other spheres, which is why business managers are increasingly confronted with a diverse workforce; employees of different origins, race, gender, or age. The policy of diversity management contributes to the strengthening of social responsibility of the company and is also an element of the competitiveness. Our research was aimed to enhance understanding of diversity management importance in nowadays organization, to explain various aspects of management diversity, it´s legislative framework. Another objective was to examine perception of the issue of management diversity by the middle managers of various organisations in Slovakia. To achieve these goals we used methods of literature review, desk review; primary data were collected by questionnaire and interview. Finding show the relation between demographic development and diversity management in companies; in examining the perception of the issue of diversity management, we found the understanding of diversity management as synonymous with anti-discrimination measures. Our research led also to recommendations for implementation of management diversity for human resource management sustainability.