Abu Kalijar Marzuban (Persian: ابوکالیجار مرزبان; died October 1048) was the Buyid amir of Fars (1024–1048), Kerman (1028–1048) and Iraq (1044–1048).

In the meantime Abu Kalijar had built up his power in Fars, although the first several years of his reign were marked by the oversight of his tutor, a eunuch named Sandal, and entered into a conflict with the Buyid ruler of Kerman, Qawam al-Dawla.

Abu Kalijar shortly sent an army under his vizier Bahram ibn Mafinna, who managed to conquer Khuzistan.

In the meantime, the Kakuyids of Isfahan were torn between two rival brothers, and Abu Kalijar attempted to force them to submit to his authority.

Abu Kalijar marched to reassert his authority, only to be met with an ambassador of the governor, who brought gifts and a promise to renew his allegiance.

He was succeeded by his son al-Malik al-Rahim, but the Buyids suffered a succession struggle soon after his death, and Kerman entered into the Seljuk orbit.