The Arulmigu Nellaiappar Temple in Tirunelveli, Tamil Nadu, is a revered Hindu temple dedicated to Lord Shiva, worshipped here as Nellaiappar (also called Venuvananathar), and his consort Goddess Parvati, depicted as Kanthimathi Amman. The temple is situated on the northern banks of the Thamirabarani River and is classified as a Paadal Petra Sthalam, meaning it is revered in the 7th-century Tamil Saiva canonical work, the Tevaram, written by Tamil saint poets known as the Nayanmars.

The temple complex covers an area of 5.9 hectares (14.5 acres) and features a number of shrines, with those of Swamy Nellaiappar and Sri Kanthimathi Ambal being the most prominent. The temple has a rich history, with contributions from the Early Pandyas, Medieval Cholas, Pallavas, Cheras, and Madurai Nayaks. The temple is known for its musical pillars in the Nada Mani Mandapam, which produce musical sounds when struck.