Professional socialization has become a notable construct for social work with the publication of the Council on Social Work Education's (2008) revised "Educational Policy and Accreditation Standards." Though historically regarded as essential, little is known about the professional socialization of social workers. This article presents professional socialization as a key element that bridges the explicit and implicit curricula. Results from this study provide empirical support for a theoretical framework of the professional socialization of social workers with a particular focus on factors that predict professional socialization, which is defined as a multidimensional, temporal construct beginning before formal education and continuing after it, with values, attitudes, and professional identity as outcomes. Implications for social work education, development of systematic research in this area, and recruitment and retention are discussed. (Contains 3 tables.)