Sejong the Great Memorial Hall is a memorial hall located in Cheongnyangri-dong, Dongdaemun-gu, Seoul, and was built to celebrate the success and achievements of Sejong the Great and to preserve it for a long time.

The Sejong Daiou Memorial Business Association was laid down on October 9, 1968, completed on November 19, 1970, and opened on October 9, 1973.

It consists of exhibition rooms such as Sejong the Great's one's life story room, Hangul room, science room, and Korean traditional music room.