|This is a study on the Mishnah, a literature of great significance in Jewish religion. The Mishnah is an earliest compilation of the rabbinic law and discussion. It includes interpretations of and commentaries on the Torah during the earliest stages of rabbinic Judaism. And the richest source for moral discussion in the Mishnah is the tractate of Abot or Pirke Abot, a collection of the ethical instructions and proverbs of the rabbis in Mishnaic period. This tractate, consisting of five chapters, contains the teachings of respected rabbis or sages from 300 B.C. to A.D. 200. The present study aimed to pursue the ethical teachings of the tractate of Abot. It thematically grouped the texts of the Avot that are related to moral discussion, and they are categorized into the following four groups according to their themes. First, teachings about respecting God; second, teachings related to personal attitudes; third, teachings related to public relations and social life; and fourth, teachings related to personal relationship.