| Banu Ash'ar | |
| Local Name: | بنو الأشعر |
| Type: | Qahtanite Arab |
| Ethnicity: | Arab |
| Descended: | Nabat ibn Udad |
| Nisba: | Al-Ash'ari الأشعري |
| Location: | Yemen, Palestine |
| Religion: | Paganism, later Islam |
Banu al-Ash'ar (Arabic: بنو الأشعر; Ancient South Arabian:, ʾs²ʿrn) also known as al-Ashaira (Arabic: الأشاعرة|link=no) is a Qahtanite tribe that inhabited Yemen in the Arabian Peninsula. The companion of the prophet, Abu Musa al-Ash'ari is a member of this tribe.
The progenitor of Banu al-Ash'ar is Nabat ibn Udad who is also known as al-Ash'ar. The tribe's lineage is as follows: Nabat ibn Udad ibn Zayd ibn Yashjub ibn Arib ibn Zayd ibn Kahlan ibn Saba' ibn Yashjub ibn Ya'rub ibn Qahtan.[1]
Nabat ibn Udad (Ash'ar) had seven sons: Al-Jamahir, al-Atgham, al-Argham, al-Adgham, Jedda, Abd Shams and Abd al-Thurayya.[2]
Banu al-Ash'ar tribe was originally from Zabid in Yemen. After the Islamic Conquests under the Rashidun Caliphate (631-661), Many members of the Banu al-Ash'ar moved to settle in Bilad al-Sham. According to Ya'qubi who is writing in 892, the Banu Ash'ar were the majority around Tiberias.[3] Records show that they were among the Arab tribes which settled in al-Andalus. The majority settled in the district of Rayya in Malaga, while some of them were also to be found in the city of Seville.[4]