Mannar is a town in the Chengannur taluk in the Alappuzha district in the Indian state of Kerala, located on State Highway 6. It is also called the Bell Metal Town. Mannar was the site of the famous Treaty of Mannar Mannar Harmony Deed, concluded between the Maharaja of Travancore Marthanda Varma and the King of Kayamkulam in 1742.