Thomas Su Keong Siong (simplified Chinese: 苏建祥; traditional Chinese: 蘇建祥; pinyin: Sū Jiànxiáng; Pe̍h-ōe-jī: So͘ Kiàn-siông) is a Malaysian politician and lawyer who has served as the Member of the Pahang State Legislative Assembly (MLA) for Ketari since November 2022.
[4] Su first involved in politics when he contested but lost as DAP candidate in 1999 for the state seat of Malim Nawar in Perak.
During the short Pakatan Rakyat (PR) coalition rules of Perak, he was elected as an exco member in the state government led by Menteri Besar Nizar Jamaluddin in 2008.
In the 2013 election Su won the Ipoh Timor parliamentary seat and succeeded incumbent Lim Kit Siang as its MP, who contested in Gelang Patah in Johor.
According to Human Resources Minister M. Kulasegaran, the then recently-elected Pakatan Harapan government had instructed the Attorney General to review Section 9(1) of the Peaceful Assembly Act 2012, which was the provision under which Su had been charged.