The starting point of this thesis is based on knowledge management in the enterprise. Knowledge management refers to systematical process of establishing, maintaining and directing the entire organization for the purpose of using knowledge in order to create business values and generate competitive advantage. The goal of knowledge management is to provide organizations an enhanced decision-making management quality by ensuring reliable and secure information and data availability throughout the service lifecycle. For a company, knowledge represents a set of knowledge and many other qualities that employees have and by whom they contribute to the business development and its competitiveness. Knowledge can be stored in the special databases for knowledge (also known as knowledge bases), repositories or in some other digital record. For a company it is only important that information about every step or process is recorded into one of the repositories or databases, so that it could be transferred further to future employees. It can be be said that the knowledge base is very important for each company and that it represents a set of good practices by whom the company develops its business strategy. The work itself will explain the conceptual definition of knowledge management, the method of successful knowledge management knowledge management model.Also, the methods of successful knowledge management in some croatian companies are explained on the basis of examples from practice.