Ju To-il (Korean: 주도일; Hanja: 朱道一;[1] 1922 – July 5, 1994) was a North Korean army officer who served as the personal guard of Kim Il Sung held the rank of Vice-Marshal.

Since the age of 15, he has been active as a guard and messenger for Kim Il Sung and his guerrilla unit.

In the early 1940s, he worked as a special reconnaissance unit of the Soviet Army across the Tumen River.

In accordance with the three-dimensional tactics of the modern war, he was the protagonist of the creation and reinforcement of the sniper unit by ingeniously emphasizing the position and role of the light and sniper units, and as an active advocate of the reinforcement of the light armed forces, he contributed to the modernization and military strength of the North Korean military.

[2] He was a guard and assistant to Kim Il Sung for a long time with Ri Tu-ik, Jo Myong-rok, Paek Hak-rim, and Jon Mun-sop, and supported his power after Kim Jong Il was injured.