This paper provides an introduction into the field of international entrepreneurship. A definition of international entrepreneurship and associated key concepts is given and the research domain of international entrepreneurship is described. A substantial part of the international entrepreneurship literature concentrates on the internationalization of small and medium-sized enterprises (SMEs) and new ventures. Based on an analysis of the existing literature the current paper provides a framework for the study of antecedents and outcomes of SME and new venture internationalization and presents a number of avenues for future research.