Purpose: The purpose of this article is to propose a conceptual framework for social justice leadership as praxis and to explore the implications of this framework for leadership preparation programs. Conceptual Argument: The conceptual framework for social justice leadership is grounded in a review of literature and organized around three central concepts. First, leadership for social justice is conceived as a praxis, in the Freireian sense, involving both reflection and action. Second, leadership for social justice spans several "dimensions", which serve as arenas for this praxis. These dimensions include the personal, interpersonal, communal, systemic, and ecological. Third, each dimension within the framework requires the development of "capacities" on the part of the leader, capacities for "both" reflection and action. The author argues that the central purpose of leadership preparation programs is to develop these capacities in aspiring school leaders. Implications: At present, the literature on social justice leadership and most preparation programs address some of the capacities for social justice leadership well (e.g., critical consciousness about social justice issues) but others poorly or not at all (e.g., the actual skills needed for leadership praxis). The praxis framework proposed in this article facilitates a more detailed and comprehensive analysis of the capacities needed by contemporary school leaders working for social justice and therefore how preparation programs might be designed and delivered. (Contains 3 notes and 1 figure.)