Thiruthuraipoondi Radhakrishnan Sivasankaran (T. R. Pappa) (3 July 1922 – 15 October 2004) was an Indian music director of Tamil, Telugu and Sinhalese films.

In 1941 most of the citizens was flying to other towns due to fear of Japanese Bombing Jupiter Pictures was shifted to Coimbatore, M.S.Viswanathan went with S.V.Venkatraman who is famous music director on those days.

Then onwards, Papa went on to compose for many of Citadel films such as Mallika, Vijayapuri Veeran, Vilakketriyaval, Iravum Pagalum and Kathal Paduthum Padu.

He worked with singers like T. M. Soundararajan, A. M. Rajah, Seerkazhi Govindarajan, Thiruchi Loganathan, C. S. Jayaraman, S. C. Krishnan, A. L. Raghavan, M. L. Vasanthakumari, P. Leela, Jikki, T. V. Rathnam, A. P. Komala, P. B. Sreenivas, K. Jamuna Rani, P. Susheela, A. G. Rathnamala, T. S. Bagavathi, Soolamangalam Rajalakshmi, A. Nithyakala, S. Janaki, L. R. Eswari, S. P. Balasubrahmaniam, B. S. Sasirekha and S. P. Sailaja.

He composed music for many wonderful devotional albums with Seerkazhi Govindarajan where the song Chinnanjiru Penn Pole dedicated to the Goddess Abirami is notable.