This article deals with Abh al-Aswad al-Du’ali (605-688 A.D.), founder of Arabic grammar rules and his position in Arabic grammar history. He lived in Basrah, center of the grammar activities in the early period of Islamic history. According to the classical Islamic sources, he wrote grammar rules firstly and he taught them to another people. In this way Arabic grammar became an area of study and in the following period, a lot of books were wiritten on it