Although cultural diplomacy has grown in importance in recent years, there is no consensus on its definition. Cultural diplomacy is commonly framed in terms of soft power: the capacity of persuasion and attraction that allows the state to construct hegemony without using coercive methods. In this article, I offer a critical analysis of this theory's limitations. To shed light on this situation, I provide an historical analysis of cultural diplomacy. Based on this historical analysis and on an extensive desk research, I examine the dominant methodological and conceptual articulation of soft power in cultural diplomacy literature to clarify how the logical framework of soft power favors a specific and restrained conception of these policies, narrowing its understanding and legitimating its economic and political instrumentalization.