Sophocles' Ajax, or Aias, is a Greek tragedy written in the 5th century BCE. Ajax may be the earliest of Sophocles' seven tragedies to have survived, though it is probable that he had been composing plays for a quarter of a century already when it was first staged.
Sophocles is one of three ancient Greek tragedians whose plays have survived. His first plays were written later than or contemporary with those of Aeschylus, and earlier than or contemporary with those of Euripides.