Bey Ertugrul of Amastris (21 March 1342-) was the Ottoman Bey of Amastris from 19 July 1350, succeeding Bey Khuyildar of Amastris. A member of the Sunni Turkish Bistami family, he succeeded his father on his banishment in 1350, and the young Ertugrul remained on good terms with the Ottoman regent Suleyman Pasha despite his father's fate.