A common resource in academic and empirical studies used to explain the performance of communities, nations and interorganizational networks in the last two decades has been social capital.. This study aims to measure social capital in collaborative networks of the wine cluster of Serra Gaúcha (Brazil). Initially, we conducted extensive theoretical research on social capital and collaborative networks in order to build variables related to the networks context and to create a survey in the form of a questionnaire for measuring social capital. We used techniques of quantitative analysis and descriptive statistics. The study shows a presence of high levels of social capital evenly distributed in the Brazilian wine industry in the three dimensions studied: relational, structural and cognitive. The results also show that the different combinations of social capital elements can lead to different results, or idiosyncratic organizational realities.