The concept of open innovation (OI) has become a very popular topic during the last decade, with increasing number of SMEs embracing OI practices to gain competitive advantage. This edited volume is a timely opportunity to gather research on OI in SMEs, to investigate how OI is managed and implemented to determine the peculiarities compared to OI management in large companies, and to specify the consequences for future OI research.The book offers insights into the following topics: The state of the art on open innovation in SMEs; adopting open innovation in SMEs; interorganizational networks and innovation ecosystems; sectoral patterns of open innovation in SMEs; and measuring, evaluating and stimulating open innovation in SMEs.