Rav Ashi (Hebrew: רב אשי) ("Rabbi Ashi") (352–427) was a Babylonian Amoraic Talmid Chacham, who reestablished the Academy at Sura and was first editor of the Babylonian Talmud. According to a tradition preserved in the academies, Rav Ashi was born in the same year that Rava, the great teacher of Mahuza, died, and he was the first teacher of any importance in the Talmudic Academies in Babylonia after Raba's death. Simai, Ashi's father, was a rich and learned man, a student of the college of Naresh near Sura, which was directed by Rav Papa, Raba's disciple. Ashi's teacher was Rav Kahana, a member of the same college, who later became president of the academy at Pumbedita.
While still young, Rav Ashi became the head of the Sura Academy, his great learning being acknowledged by the older teachers. It had been closed since Rav Chisda's death (309), but under Rav Ashi it regained all its old importance. His commanding personality, his scholarly standing, and wealth are sufficiently indicated by the saying, then current, that since the days of Rabbi Judah haNasi, "learning and social distinction were never so united in one person as in Ashi." Indeed, Rav Ashi was the man destined to undertake a task similar to that which fell to the lot of Judah I. The latter compiled and edited the Mishnah; Rav Ashi made it the labor of his life to collect after critical scrutiny, under the name of Gemara, those explanations of the Mishnah that had been handed down in the Babylonian academies since the days of Rab, together with all the discussions connected with them, and all the halakhic and haggadic material treated in the schools.