Activities of today's organizations is largely based on knowledge. Our knowledge enables us to plan, organize and carry out activities, which are the essence of the organization. Knowledge is not only a condition of organizations’ creation, but is also responsible for its development and activities in the future. However, the knowledge of knowledge uneven - the most popular and most known its division is the division of tacit and explicit knowledge. Explicit, as the name suggests, is the knowledge passed on in the form of information, materials or data, while tacit knowledge is the knowledge in non-material form. Both types consist of knowledge, which is in the possession of both, the organization and its employees. This article presents the characteristics of both types of knowledge, with an emphasis on tacit knowledge and its impact on the efficiency of logistics processes, taking place in organizations.