This paper examines the role of open innovation inward technology transfer in order to strengthen the innovative position of Polish enterprises. The problem for Polish companies is their low interest in open sources of innovation which in a modern economy based on innovativeness, highly processed and technologically advanced products is a very important source of competitiveness superiority. On the other hand open innovation sources are less expensive and risky especially for the companies without any business experience and financial resources. The objective of this article is to shed a light on the role of the open innovation sources in technology transfer process within Polish enterprises. The work aims to provide a better characterization and understanding of open innovation as a part of technology transfer in the light of formal and informal flows. The objective of this paper is also to examine the statistical data collected from the Main Statistic Office in Poland relating to the technology transfer of entrepreneurs and its influence on the innovativeness of a company.