This chapter introduces the complexity of village credit networks in late medieval rural Tirol. The first part discusses the diversity of credit relations that existed in medieval societies and how they can be profitably studied by means of social network analysis. This is important because the analysis of credit relations is not a straightforward matter. Credit relationships must be analysed in the context of other social and economic activities. The second part analyses the credit behaviour of the inhabitants of the village of Laas in the late fourteenth century, emphasising the importance of social relations for the acquisition of credit. The use of a social network analysis allows a deeper understanding of the diversity of needs and the different relationships within a village community that included both formal markets and informal networks. The last section discusses the results of the social network analysis and to what extent graph theory provides explanations for the functioning of credit networks.