The Nellaiappar Temple is a Hindu temple dedicated to the deity Shiva, located in Tirunelveli, a city in the South Indian state of Tamil Nadu. Shiva is worshipped as Nellaiappar (also called Venuvananathar) represented by the lingam and his consort Parvati is depicted as Kanthimathi Amman.
The temple is located on the northern banks of Thamirabarani River in Tirunelveli district. The presiding deity is revered in the 7th century Tamil Saiva canonical work, the Tevaram, written by Tamil saint poets known as the nayanmars and classified as Paadal Petra Sthalam.
The temple has three six rituals at various times from 6:00 a.m. to 9:00 p.m., and six yearly festivals on its calendar. Brahmotsavam festival during the Tamil month of Aani (June–July) is the most prominent festival celebrated in the temple.