U Tak (Korean: 우탁; Hanja: 禹倬, 1262-1342), also known as Woo Tak, was a Korean Neo-Confucian scholar and philosopher during Korea’s Goryeo dynasty. He was also commonly known as Yeokdong Seonsaeng (Korean: 역동선생; Hanja: 易東先生). His pen names were Baekun and Danam, his courtesy names were Cheonjang and Takbo, and his posthumous name was Moonhee. U Tak helped spread Neo-Confucianism, which had come from the Yuan dynasty, in Korea. He was a disciple of the Neo-Confucian scholar, An Hyang.