This publication documents the development of the ISSP module for the year 2017 titled "Social Networks and Social Resources". The authors begin by discussing instruments that have been developed to measure social relationships and networks. Subsequently, the conceptual framework underlying the module is presented. For the assessment and selection of items for the final module the authors can draw on a rich set of comparative survey data from pretests in China, Taiwan, France, Germany, Switzerland, Turkey, Great Britain, United States and Venezuela. Based on these data measures for all concepts of the theoretical model are derived and preliminary analysis of their validity, reliability and cross-national equivalence are performed. The publication ends with a description of items finally selected for the 2017 ISSP module and some suggestions for analyzing these data.