Yi Gae (Korean: 이개; Hanja: 李塏; 1417–1456) was a Korean scholar-official of the Joseon period who came from the yangban Hansan Yi clan and one of the six martyred ministers.
Yi passed the higher examination in 1436, and he was appointed to the Hall of Worthies by Sejong in 1441.
After Munjong rose to the throne in 1450, he was appointed to provide personal instruction in the classics to the prince, who became the young King Danjong in 1453.
Yi joined a conspiracy of other high officials to overthrow Sejo and return Danjong to the throne; but just before the plot would have unfolded, it was betrayed to the king by Kim Chil.
Yi Gae wrote the following death poem in prison before his execution:[citation needed] 방안에 혔는 촛불 눌과 이별하엿관대 겉으로 눈물지고 속타는 줄 모르는다.