Abd al-Aziz ibn Mansur (), also known as Al-Maymun (the Happy) was the ruler of the Hammadids from 27 July 1105 to 1121.
Abd al-Aziz was born on the day his father Al-Mansur ibn al-Nasir ascended the throne. He succeeded his brutal brother Badis in 1105. Badis had dismissed his brother from his governorship of Algiers and was relegated to Jijel. Abd al-Aziz then returned from Jijel to Bejaia to exercise power.
Abd Al-Aziz married a daughter of Makhoukh, a famous chieftain of the Beni-Ouamannou (a Zenata tribe). Their marriage renewed the peace with the Beni-Ouamannou.