Sundarar (Tamil: சுந்தரர்), also referred to as Chuntarar, Chuntaramurtti, Nampi Aruran or Tampiran Tolan, was an eighth-century poet-saint of Tamil Shaiva Siddhanta tradition of Hinduism. He is among the Tevaram trio, and one of the most prominent Nayanars, the Shaiva bhakti (devotional) poets of Tamil Nadu.

His hymns form the seventh volume of the Tirumurai, the twelve-volume compendium of Shaiva Siddhanta. His songs are considered the most musical in Tirumurai in Tamil language. His life and his hymns in the Tevaram are broadly grouped in four stages. First, his cancelled arranged marriage through the intervention of Shiva in the form of a mad petitioner and his conversion into a Shaiva bhakt. Second, his double marriage to temple dancers Paravai and Cankali with their stay together in Tiruvarur. Third, his blindness and then return of his sight. Finally, his reflections on wealth and material goods.