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| Seong Sam-mun | |
| Hangul | 성삼문 |
|---|---|
| Hanja | 成三問 |
| Revised Romanization | Seong Sammun |
| McCune–Reischauer | Sŏng Sammun |
| Art name | |
| Hangul | 매죽헌 |
| Hanja | 梅竹軒 |
| Revised Romanization | Maejukheon |
| McCune–Reischauer | Maejukhŏn |
| Courtesy name | |
| Hangul | 근보, 눌옹 |
| Hanja | 謹甫, 訥翁 |
| Revised Romanization | Geunbo, Nurong |
| McCune–Reischauer | Kŭnbo, Nurong |
Seong Sam-mun (Korean: 성삼문; Hanja: 成三問; 1418 – 8 June 1456) was a scholar-official of the early Joseon period who rose to prominence in the court of King Sejong the Great (r. 1418–1450). He was executed after being implicated in a plot to dethrone King Sejo (r. 1455–1468) and restore his predecessor King Danjong (r. 1452–1455), and is known as one of the sayuksin (사육신, the six martyred ministers) with reference to this plot.