Masteabar was a petty king of western Numidia.
It seems that Gauda, on his death in 88 BC, divided his kingdom between his sons, Hiempsal receiving the larger part and Masteabar the smaller.
[1] In 81 BC, a rebellious Roman general, Domitius, allied with a Numidian king named Hiarbas, who appears to have displaced the sons of Gauda.
The allies were defeated by the Roman general Pompey, Hiempsal being restored to his throne and Masinissa being placed on the western throne.
[2] Masteabar's grandson, Arabio, was the last independent Numidian king in 42 BC.