The publication presents the results of research about the level of knowledge management in micro, small and medium-sized enterprises from Poznan county and the awareness of entrepreneurs of how important it is for the proper functioning of their enterprises. After an initial introduction to knowledge management and division of knowledge into different types, the results of a survey conducted among twenty enterprises are presented. Businesses had the opportunity to select multiple choices in asked questions, but very often added their own comments based on their long-term experience. What is more, in the future research will include more enterprises also from other cities of the Greater Poland province.