Lean management means managing business processes in such a way as to remove from them all factors that do not bring value to the final product or service. It was developed in the automotive industry, that is, as part of the production of the Toyota company. However, a management concept that emphasizes waste elimination is now recognized as effective in many industries. As part of lean management, numerous tools have been developed that facilitate the application of lean management principles in business processes. Before implementing lean tools in business processes, it is important to determine key problems in business and identify lean tools that can be most effective in this area. This paper presents the basic features of four lean tools: kaizen, just in time, 5S methodology and kanban. These tools are aimed at removing obstacles in business and improving business processes through their implementation. The aim of this paper is to explain the key features of lean management and to present some of the most frequently used lean tools in a theoretical and practical sense. The results indicate that lean tools can improve business processes and relationships if they are continuously implemented in the company.