Muzaffar al-Din Uzbek, also known as Ozbeg ibn Muhammad Pahlawan (died 1225) was the fifth and last ruler (atabeg) of the Eldiguzids from 1210 to 1225, during the later Seljuk and Khwarazmian periods.

He defeated another one of Uzbeg's mamelukes Aytoghmish in January 1212 and seized Isfahan, Hamadan, Ray and neighboring regions (i.e. Persian Iraq).

Forging a coalition against this new powerful rebel, Uzbek brought Caliph Al-Nasir and Hassan III of Alamut together and defeated Mengli in September 1215.

[2][3] Uzbek's new subordinate emir Aghlamish in Persian Iraq expressed his submission to Muhammad II of Khwarazm but was assassinated in 1217.

He ordered his subordinate and ruler of Ahar, Nusrat ad-Din Pishkin, to escort him to Tabriz with his army and supplies, and he concealed himself in the inaccessible mountains of Azerbaijan with 200 faithful ghulams.

However, the Khwarazmshah's army seized Nusrat ad-Din at Miyaneh,[4] beat him utterly, confiscated all of Uzbek's valuables, and captured his vizier Dandan.

According to Tarikh-i Jahangushay, Uzbek's grandson through Khamush, Nusrat al-Din fled to Sultanate of Rum but returned to Nakhchivan and was appointed as tümen commander of Azerbaijan by Möngke Khaqan.

[10][7]According to C.E.Bosworth, Ozbeg is harshly criticised by chroniclers for his laziness and fondness of opulent life, although he fought formidable opponents in the Georgians, Khwarazmians, and Mongols.