Seongcheol (April 6, 1912 – November 4, 1993) was a Korean Seon master. He was a key figure in modern Korean Buddhism, being responsible for significant changes to it from the 1950s to 1990s. Seongcheol was widely recognized in Korea as having been a living Buddha, due to his extremely ascetic lifestyle, the duration and manner of his meditation training, his central role in reforming Korean Buddhism in the post-World War II era, and the quality of his oral and written teachings.