Sim Tze Tzin (Chinese: 沈志勤; pinyin: Shěn Zhìqín; Pe̍h-ōe-jī: Sím Chì-khîn; born 6 February 1976) is a Malaysian politician who served as the Deputy Minister of Agriculture and Agro-based Industry in the Pakatan Harapan (PH) administration under former Prime Minister Mahathir Mohamad and former Minister Salahuddin Ayub from July 2018 to the collapse of the PH administration in February 2020. He has served as the Member of Parliament (MP) for Bayan Baru since May 2013. He is a member of Parliamentary Special Select Committee for International Affairs. He also served as Member of the Penang State Legislative Assembly (MLA) for Pantai Jerejak from March 2008 to May 2013. He is a member and Strategy Director of the People's Justice Party (PKR), a component party of the PH opposition coalition.