The objective of this article is to develop and validate the scale for measuring organizational social capital consolidation (OSCC). Background. The problem of methodological support for the study of the social capital of an organization is relevant, since there are no reliable and proven methods of its research in social psychology to date. In accordance with the concept proposed by us, a methodology for diagnosing the main components of the organization’s social capital has been developed, its reliability and validity have been verified. Study design. The study comprises a three-phase process. In the first phase, the OSCC scale was developed. In the second phase, five socio-psychological studies were conducted by using OSCC scale in various organizations. The third phase includes the analysis of psychodiagnostics capabilities of the developed scale, its reliability, and validity. Participants. A total of 382 employees from 23 to 46 years old working for St. Petersburg organizations participated in the study. The average age was 35 years old. Males accounted for 40,6% of the sample, while females — 59,4%. Methods. The study applies the confirmatory factor analysis, the analysis of internal consistency and correlation analysis. Results. OSCC scale has construct validity and is reliable across the samples. The scale consists of four components: trust, commitment to targets and organizational values, following behavioral norms, and support of organizational reputation. Each component, anchored on a 5-point scale, includes four items. Conclusion. The OSCC scale is valid and reliable for measuring the main components of organizational social capital and estimating its consolidation.