Chiu Tai-san (Chinese: 邱太三; pinyin: Qiū Tàisān; born 30 August 1956) is a Taiwanese lawyer and politician.

Chiu studied law at National Taiwan University and worked as a prosecutor for the district courts of Tainan and Hsinchiu.

[1] A member of the Democratic Progressive Party's New Tide faction,[2] Chiu began his political career as a secretary for Taichung County Magistrate Liao Yung-lai.

[15] After leaving the Kaohsiung City Government, Chiu taught at Asia University, eventually leading its financial and economic law department.

[19] In March 2016, Chiu resigned his Taoyuan City Government position to serve as a policy advisor to president-elect Tsai Ing-wen.

[31] Chiu resigned from the National Security Council on 2 April 2019, shortly after the Taiwan High Court Prosecutors' Office charged him with influence peddling.

[32][33] In December 2019, Chiu was appointed to lead a Democratic Progressive Party task force convened to combat electoral fraud during the January 2020 elections.