Sa Jae-Hyouk (Hangul: 사재혁, Hanja: 史載赫; ; born January 29, 1985, in Hongcheon, Gangwon-do, South Korea) is a South Korean weightlifter. He is 165 cm tall.
In 2005, Sa won two gold medals in the clean and jerk and total at the 1st Junior World Weightlifting Championships in Busan, South Korea.
At the 2007 World Weightlifting Championships he ranked 5th in the 77 kg category, with a total of 353 kg.
In 2008, he won a gold medal in the 77 kg class at the 2008 Summer Olympics in Beijing.
At the 2009 World Weightlifting Championships he ranked 4th in the 77 kg category, with a total of 365 kg.
At the 2012 Summer Olympics, he dislocated his elbow while attempting 162 kg in his second snatch attempt and was forced to withdraw from the competition.