Yi Chingok (, 1399 â November 20, 1453) was a general of the Korean Joseon dynasty, known for his rebellion in 1453.
He served as the Provincial Army Commander or byeongma dojeoljesa () of Hamgil Province from 1450 until 1453. As a former subordinate of Kim Chongsà  who was killed by his political rival Grand Prince Suyang (the future King Sejo), Yi was recalled by Grand Prince Suyang-controlled royal court who tried to replace him with Pak Ho-mun () in 1453. However, Yi killed his new replacement and rose up in rebellion. He attempted to gather Jurchen support for his rebellion by declaring himself the emperor of the Geum dynasty (), a revival of the Jurchen Jin. He wanted to establish the new dynasty's capital at Wuguocheng (; ), but was killed in by his subordinates, Chà Âng Chong () and Yi Haeng-gà Âm () before he could cross the Tumen River.