Michael Jeyakumar Devaraj (Tamil: ??????? ?????????) (born 28 March 1955) is a Malaysian politician and currently as the chairperson of Socialist Party of Malaysia.
He served in the Parliament of Malaysia as Member of Parliament for the Sungai Siput constituency in Perak from 2008 to 2018.Jeyakumar is a prominent member of the Socialist Party of Malaysia (PSM) but was elected to Parliament on the ticket of the People's Justice Party (PKR) in the Pakatan Rakyat (PR) opposition coalition.
His win in the 2008 general election unseated Samy Vellu; the long-serving President of the Malaysian Indian Congress (MIC).
Samy Vellu had previously defeated Jeyakumar in Sungai Siput in the 1999 and 2004 general elections.
Jeyakumar successfully retained his seat in the 2013 general election.
However, he contested under PSM's own ticket and lost his seat in the 2018 general election, garnering just 3.52% of the votes cast and losing his deposit.