Panruti S. Ramachandran (born 10 November 1937 in Panruti, Madras Presidency) is an Indian Tamil politician and former Member of the Legislative Assembly of Tamil Nadu. He served as the Deputy Leader of the Opposition in the floor of Tamil Nadu Legislative Assembly during 2011 to 2013. He also served as the party presidium chairman of DMDK till 2013. He is one of the politician who joined all Major Parties In Tamil Nadu which includes DMK, AIADMK, PMK, DMDK and then back to AIADMK.