Zhan Ruoshui (Chinese: 湛若水; pinyin: Zhàn Ruòshuǐ; Wade–Giles: Chan Joshui, 1466–1560) was a Chinese philosopher, educator and a Confucian scholar.
He was later appointed the Minister of Rites (禮部, which mainly administers national ceremony, sacrifice, imperial examination, education, diplomacy, etc.
As a scholar, Zhan is famous for mind theory.
Zhan was a lifelong friend of the philosopher, general, and administrator Wang Yangming.
He shared an appreciation of Lu Xiangshan idealism (xinxue), Daoism, and Buddhism with Wang, although their intellectual paths ultimately diverged.