Ghulam al-Khallal (Arabic: غلام الخلال, died 973), full name Abu Bakr 'Abd al-Aziz ibn Ja'far, was a Muslim Hanbali scholar and theologian.

[1][2][3] He was a close student of Abu Bakr al-Khallal, hence he received his name Ghulam, which means assistant.

He is known to have been a companion of Ahmad ibn Hanbal, the founder of the Hanbali school of thought.

[1][2][5][3] The historian Al-Dhahabi praised him, saying that “no one came after the companions of Ahmad like Ghulam al-Khallal, and no one came after him in turn like Abdul Aziz, unless he was Abu al-Qasim al-Kharaqani.”[5] Ghulam al-Khallal was also a Hadith narrator, and scholars including Ibn Battah narrated from him.

Modern historians including Imad Abd al-Salam Rauf and Yunus as-Samarrai have identified the grave in the mausoleum as belonging to Ghulam al-Khallal.