Abu Ja'far Muhammad (Persian: ابو جعفر محمد), was the ruler of the Bavand dynasty from an unknown date until his capture and defeat by the Kakuyids in 1027.

Abu Ja'far, during his reign, was a vassal of the Buyid ruler Majd al-Dawla (r. 997–1029), who was himself of Bavandid descent through his mother Sayyida Khatun.

Majd al-Dawla, however, refused to make him governor of Qazvin, which made Ibn Fuladh threaten him around the countryside of his capital in Ray.

This is the palace of the amir, the important lord, Abu Ja'far Muhammad ibn Vandarin Bavand, client of the Commander of the Faithful.

The ispahbad Abu Ja'far Muhammad ibn Vandarin Bavand, client of the Commander of the Faithful, may God honour him with forgiveness and satisfaction and paradise, ordered commencing the construction of this shrine during the days of [his] life in 407 [1016-1017].