Lu Jiaxi (Chinese: 卢嘉锡; Pe̍h-ōe-jī: Lô͘ Ka-sek; 26 October 1915 – 4 June 2001), or Chia-Si Lu, was a Chinese physical chemist who is considered a founder of the discipline in China. He served as President of the Chinese Academy of Sciences, Founding Director of Fujian Institute of Research on the Structure of Matter (FJIRSM), and Vice President of Fuzhou University, as well as high-ranking political positions including Chairman of the Chinese Peasants' and Workers' Democratic Party, Vice Chairman of the Chinese People's Political Consultative Conference (CPPCC), and Vice Chairman of the National People's Congress.