This paper deals with the issues of knowledge management, from a theoretical point of view. Literature contained in books, professional and scientific articles as well as relevant Internet pages was used in its consideration. The concept of human resources management is a relatively new concept based on the fact that only the brain (knowledge workers) produces the value added of the enterprise. There are numerous definitions of knowledge management. Summing up some of the knowledge management definitions, it is possible to point out that knowledge management is a concept based on the use of available knowledge from external sources, which is built and maintained in business processes, products and services. Knowledge management as such implies storing knowledge in databases and documents and the transfer and use of knowledge by the entire organizational system. In order to determine the usefulness of the implementation of the concept of knowledge management, it is necessary to continuously evaluate whether the same performance of the business and the extent to which it contributes. There is an increasing number of companies that recognize the potential of knowledge management and implementiting their business to make it really profitable for their success.