Sri Paduka Dato' Bendahara Sri Maharaja Tun Muhammad Tahir ibni Almarhum Dato' Bendahara Sri Maharaja Tun Ali (1813–30 May 1863) was the fifth Raja Bendahara of Pahang who ruled the state until his death in 1863 in the Pahang Civil War.
He had three wives: Tengku Kechik, daughter of Sultan Abdul Rahman Muazzam Shah I of Johor ; Tengku Chik, daughter of Sultan Ahmad Tajuddin Halim Shah II of Kedah ; and Tengku Chik, daughter of Sultan Muhammad of Johor.
Conflict broke out between Ahmad and Tun Mutahir, which became a civil war that engulfed Pahang.
This conflict not only involved the Pahang princes but also the Temenggung and the Terengganu Sultan of Johor; while the British played a political role.
The conflict ended when Tun Mutahir was mortally wounded in 1863.