For the last few years researchers in business administration have increasingly become aware of the central role of small and medium enterprises for the prosperity of an economy. As a consequence, "entrepeneurship" has grown a most relevant sub-discipline in business administration. This special issue focuses on the specific problems in the field of finance that are essential for small and medium enterprises. The articles offer an excellent overview of research questions lying at the very heart of entrepreneurial finance and thus may serve as the starting point for further interesting investigations.