He Jin (died 189),
courtesy name Suigao, was the elder half-brother of
Empress He, consort to
Emperor Ling of the late
Eastern Han Dynasty in
China. He shared power with his sister as regents in 189, following the death of Emperor Ling. In the ensuing struggle with the influential eunuch faction for power, He Jin was assassinated. His death allowed
Dong Zhuo to seize military control over the capital
Luoyang and take control of the imperial court. The subsequent breakdown of central command brought forth the beginning of massive civil wars which led to the formation of the era known as the
Three Kingdoms.