Rabbi Tarfon or Tarphon (Hebrew: רבי טרפון, from the Greek Τρύφων Tryphon), a Kohen, was a member of the third generation of the Mishnah sages, who lived in the period between the destruction of the Second Temple (70 CE) and the fall of Betar (135 CE).
Rabbi Tarfon was a resident of Yavneh, but Jewish sources show that he also lived and taught in Lod. He was of priestly lineage, and he once went with his uncle on his mother's side to participate in the priestly prayer in the Temple in Jerusalem. As a priest, he would demand the heave-offering (terumah) even after the Temple had fallen, while his generosity made him return to the father the redemption-money for the first-born, although it was his priestly perquisite.
Although wealthy, he possessed extraordinary modesty; in one instance he deeply regretted having mentioned his name in a time of peril, since he feared that in using his position as teacher to escape from danger he had seemingly violated the rule against utilizing knowledge of the Torah for practical ends.
Rabbi Tarfon was an adherent of the school of Shammai, though he was inclined toward leniency in the interpretation of those halakhot of Shammai which had not actually been put into practise; often he decided in direct opposition to the followers of Shammai when they imposed restrictions of excessive severity. In his view, "objective views are always the determinative criterion in reaching legal decisions. He consistently decides to the advantage of the priest, and also encourages the performance of rituals in which the priest occupies the central role."
R. Tarfon engaged in halakhic controversies with Rabbi Akiva, with Shimon bar Yochai, and R. Eleazar ben Azaryah. He is mentioned briefly with regard to Bruriah. In the discussion as to the relative importance of theory and practise, Tarfon decided in favor of the latter.