Gaṯaru (Ugaritic: gṯr) or Gašru (Akkadian: dgaš-ru, dga-aš-ru) was a god worshiped in Ugarit, Emar and Mari in modern Syria, and in Opis in historical Babylonia in Iraq. While he is relatively sparsely attested, it is known that in Ugarit he was associated with the underworld, while in Mesopotamia he was understood as similar in character to Lugalirra or Erra.