Tae To-su (Korean: 대도수; Hanja: 大道秀) was a Goryeo military official who served in the Goryeo-Khitan Wars.
[1] During the First Goryeo-Khitan War, Tae served as a senior colonel (Korean: 중랑장; Hanja: 中郎將; MR: chungnangjang), defending at the Battle of Anyung-jin (안융진; 安戎鎭).
Alongside junior colonel Yu Pang [ko], the Goryeo army was able to emerge victorious at Anyung-jin, defeating Liao general Xiao Hengde [zh].
Tae planned an attack on the nearby Liao troops with fellow Goryeo commander T'ak Sachŏng.
However, when the time came, T'ak did not send his troops, causing Tae's loss and capture by the Khitans.