This article reports a validation study of the Italian version of the Resilience Scale for Adults (RSA), a measure designed to assess individual, family, and social resilience protective resources. The RSA was administered to a clinical (i.e., substance use disorders, or SUD; N = 437) and a nonclinical sample (N = 337). A confirmatory factor analyses supported the original 6-factor structure of the RSA in both samples. The RSA correlated positively with functional coping strategies and negatively with perceived stress and dysfunctional coping strategies. Moreover, the RSA subscales discriminated between SUD and non-SUD individuals. Factorial invariance testing also confirmed comparable psychometric properties across gender. The results confirm good psychometric properties of the Italian RSA and provide support for the construct validity of the scale. The RSA may be suited for use in studies examining natural course and intervention trials.