This paper studies the determinants of the export activity of family SMEs, disentangling the three main dimensions that comprise the concept of familiness: power, experience, and culture. The results, using the F-PEC scale over a sample of 500 Spanish SMEs, show that this approach identifies the determinants that explain the export activity of family SMEs better than a simple dichotomous approach. Specifically, we find that the expertise transmitted from different generations and the family culture orientation to the firm positively affect the international activities of family SMEs; however, the composition of the firm control-management does not have any significant influence on internationalization.