In this essay we investigate several moments in Simone de Beauvoir's philosophical and literary texts in which she refers to echoes and echoing. We notice that echoes help Beauvoir to figure and amplify the ethical character of her concept of ambiguity, which is so central to her thought. We argue that, for Beauvoir, literature has privileged access to the ambiguity of existence and therefore maintains a special status in exposing us to alterity and bringing us face to face with ethical (...) responsibility. Considering her literary portrayals of echoing helps to explain why, despite her life-long philosophical engagement, Beauvoir preferred not to call herself a philosopher. Finally, Beauvoir's phenomenological insight is that in order to carry ethical resonance, the form of a written work must mirror the fundamentally ambiguous or echolalic ontological structure of human existence. (shrink)