Chief Censor put to death in the 1545 purge; founder of the Gyuam Munchung-gong branch
| Life | 1499 ~ 1547 |
| Era | 조선 |
| Clan | 은진 송씨 |
Song In-su (courtesy name Misu, pen name Gyuam) was of the Jeongnang-gong line. He impeached Kim An-ro and was exiled, rose to Chief Censor, and was implicated in the Yangjae Station wall-poster affair, dying by royal poison in 1547.
He passed the civil examination in 1522 and served as Jeongeon, Jipyeong and Gyori. He opposed and impeached Kim An-ro, which brought him exile to Sacheon; he was recalled four years later and became Yejo Chamui.
After serving as vice-minister of war and Governor of Jeolla in 1541, he became Chief Censor after Injong's accession. In 1547, slandered by Yi Gi and Yun Won-hyeong, he was implicated in the Yangjae Station wall-poster affair and put to death by poison.
He was rehabilitated under Seonjo and his confiscated property returned. Song Gi-su wrote his epitaph and Song Si-yeol his biographical account. His line is called the Gyuam Munchung-gong branch, with him as founder at the 11th generation. He should not be confused with Song In-su (宋仁壽) of the Sajik-gong branch.
His maternal grandson was the writer Sin Heum; he was a cousin of Song Gi-su and a great-granduncle of Song Si-yeol.