In this study, we introduce a conceptual framework for transnational social capital as a higher order multidimensional construct. Consistent with this view, we develop and validate a 11-item scale aimed at measuring bridging and bonding social capital embedded within a cross-border network of professional relations and ties. Data from several exploratory and confirmatory studies of executives and Master of Business Administration students show reliability and construct validity. This research instrument provides researchers with a valuable resource for assessing transnational social capital of individuals and exploring its implications.