|General of Cao Wei|
|Died||271 (aged 65–66)|
|Style name||Zichu (子初)|
Sima Wang (205–271) was a military general of Cao Wei during the Three Kingdoms period of Chinese history. He served the Jin Dynasty after the end of the Three Kingdoms period. He was the second son of Sima Fu, but was adopted by his older uncle Sima Lang, and became Sima Lang's heir.
From the time when Sima Zhao held real power over the state of Cao Wei, Sima Wang came into favor and was given high positions. Against invasions by the rival state of Shu Han, Sima Wang took command and successfully repulsed the enemy. For this accomplishment, he was given the rank of Minister over the Masses (司徒).
When Sima Yan became the first emperor of the Jin Dynasty, Sima Wang was again promoted, this time to Grand Marshal (大司馬), and he was given the title of Prince of Langyang (義陽王), elevating his status to nobility.
Of Sima Wang, it was said that he was a very able man, and that he enjoyed debates with other men of intelligence.