Senthamarai was an Indian actor who acted in Tamil cinema mostly in villain roles and theatre.

Senthamarai was born on 13 April 1935 at Kancheepuram. His family included his father Thiruvenkadam, his mother Vedammal, and brother Kamalakannan. Thiruvenkadam died when Senthamarai was seven years old. Senthamarai acted many stage plays along with Sivaji Ganesan and M. G. Ramachandran before entering film. In 1980's, he acted mainly in villainous roles, but also did character roles opposite many leading actors of those times.

Senthamarai was married to Kousalya who currently acts in Tamil serials.

Senthamarai died on 14 August 1992 of a heart attack.