Tiruvettakkudi Sundareshwarar Temple () is a Hindu temple located at Tiruvettakudi in the Karaikal district of the Union Territory of Pondicherry, in India. The presiding deity is Shiva. He is called as Sundareshwarar. His consort is known as Shantha Nayaki.
It is one of the shrines of the 275 Paadal Petra Sthalams - Shiva Sthalams glorified in the early medieval Tevaram poems by Tamil Saivite Nayanar Tirugnanasambandar.
Tirugnanasambandar describes the feature of the deity as: