The haftara or (in Ashkenazic pronunciation) haftorah (alt. haftarah, haphtara, Hebrew: הפטרה) "parting," "taking leave" (plural form: haftarot or haftoros), is a series of selections from the books of Nevi'im ("Prophets") of the Hebrew Bible (Tanakh) that is publicly read in synagogue as part of Jewish religious practice. The haftara reading follows the Torah reading on each Sabbath and on Jewish festivals and fast days. Typically, the haftara is thematically linked to the parashah (weekly Torah portion) that precedes it. The haftara is sung in a chant. (Chanting of Biblical texts is known as "ta'amim" in Hebrew, "trope" in Yiddish, or "cantillation" in English.) Related blessings precede and follow the haftara reading.

The origin of haftara reading is lost to history, and several theories have been proposed to explain its role in Jewish practice, suggesting it arose in response to the persecution of the Jews under Antiochus IV Epiphanes which preceded the Maccabean Revolt, wherein Torah reading was prohibited, or that it was "instituted against the Samaritans, who denied the canonicity of the Prophets (except for Joshua), and later against the Sadducees." Another theory is that it was instituted after some act of persecution or other disaster in which the synagogue Torah scrolls were destroyed or ruined, as it was forbidden to read the Torah portion from any but a ritually fit parchment scroll, but there was no such requirement about a reading from Prophets, which was then "substituted as a temporary expedient and then remained." The Talmud mentions that a haftara was read in the presence of Rabbi Eliezer ben Hurcanus, who lived c. 70 CE, and that by the time of Rabbah bar Nahmani (the 3rd century) there was a "Scroll of Haftarot", which is not further described. Several references in the Christian New Testament suggest this Jewish custom was in place during that era.

No one knows for certain the origins of reading the haftara, but several theories have been put forth. The most common explanation, accepted by some traditional Jewish authorities^[who?] is that in 168 BCE, when the Jews were under the rule of the Seleucid king Antiochus IV Epiphanes, they were forbidden to read the Torah and made do with a substitute. When they were again able to read the Torah, they kept reading the haftara as well. However, this theory was not articulated before the 14th century, when it was suggested by Rabbi David Abudirham, and has several weaknesses.

An alternative explanation, offered by Rabbis Reuven Margolies and Samson Raphael Hirsch (except where otherwise identified, this is the Hirsch cited throughout this article), is that the haftara reading was instituted to fight the influence of those sects in Judaism that viewed the Hebrew Bible as consisting only of the Torah.

However, all offered explanations for the origin of reading the haftara have unanswered difficulties.

Certainly the haftara was read — perhaps not obligatorily nor in all communities nor on every Sabbath — as far back as circa 70 CE: The Talmud mentions that a haftara was read in the presence of Rabbi Eliezer ben Hyrcanus, who lived at that time. The Christian Bible indicates that readings from the Prophets - but not necessarily a fixed schedule - was a common part of the Sabbath service in Jerusalem synagogues even earlier than 70 CE.

Only one person reads the haftara portion. This differs from the procedure in Torah reading, wherein the text is divided into anywhere from three to seven portions, which may be read by one person or divided amongst several.

The haftara is traditionally read by the maftir, or the last person to be called up to the Torah scroll.