Evidentialism is an internalist view (or family of views) about epistemic justification saying that a subject s’s epistemic justification entirely depends on the evidence at her disposal. In order to distil a complete theory of epistemic justification from this general principle it is necessary to answer three main questions. What kind of entities constitute a subject’s evidence? What does it take for a piece of evidence E to support a proposition P? What does it take for a subject s to (...) possess E? In this entry I describe the main answers defended in the literature in response to these three questions, and critically discuss the main objections that have been raised against evidentialism, both at a general level and as targeting more specific variants of it. (shrink)