A tragic hero is the protagonist of a tragedy. In his Poetics, Aristotle records the descriptions of the tragic hero to the playwright and strictly defines the place that the tragic hero must play and the kind of man he must be. Aristotle based his observations on previous dramas. Many of the most famous instances of tragic heroes appear in Greek literature, most notably the works of Sophocles and Euripides.

The term hamartia derives from the Greek ἁμαρτία, from ἁμαρτάνειν hamartánein, which means "to miss the mark" or "to err". It is most often associated with Greek tragedy, although it is also used in Christian theology. The term is often said to depict the flaws or defects of a character and portraying these as the reason of a potential downfall. However, other critics point to the term's derivation and say that it refers only to a tragic but random accident or mistake, with devastating consequences but with no judgment implied as to the character.