Sima Hui (birth and death dates unknown), courtesy name Decao (德操) and pseudonym Shuijing (水鏡; lit. "Water Mirror"), was a hermit who lived in the late Eastern Han Dynasty. He was from Yingchuan (present-day Yuzhou City, Henan) and lived in northern Jing Province (covering present-day Hubei and Hunan). He was popularly remembered as the one who recommend Zhuge Liang and Pang Tong to Liu Bei in the Romance of the Three Kingdoms, while it was actually his friend Pang Degong who did it in history.