Guan Suo (?-263) was a Shu officer and Guan Yu's third son, a younger brother of Guan Ping and Guan Xing, and an older brother of Guan Yinping. During the fall of Jing, he suffered major wounds and fled to Bao Jia Zhuang to recover. During the Southern Campaign, he returned to Shu and led their attack, managing to capture Meng Huo during the process. He later served with distinction during Zhuge Liang's Northern Expeditions and those of Jiang Wei, and was killed defending Chengdu from the final Wei assault.