Achankovil Shastha Temple, or the Dharmasastha Temple, is one among the five important temples dedicated to Lord Ayyappa in Kerala. Lord Ayyappa leads the Grihastha Ashrama life here – he is depicted as a family man or leads married life here. He is depicted along with his two wives – Purna and Pushkala. It is believed that the idol here was installed by Parashurama.

The Achankovil Sastha Temple is famous for curing poisonous snake bites. The left hand of the idol of Ayyappa at Achankovil Shastha Temple always holds ‘Chandan’ (sandalwood paste) and Theertha (holy water). The Chandan and Theertha are considered to have medicinal properties to cure snake bites.

The temple complex also contains other deities associated with the Ayyappa legend. The festivals and rituals held here have strong Tamil roots.

During the Sabarimala pilgrimage, devotees also visit this temple to offer their prayers. It is believed that the idol of this temple was consecrated by Sage Parasurama. On both sides of the idol, Poorna and Pushkala, the consorts of Lord Sastha are also installed. The most important festival here is celebrated from the first to tenth day of Malayalam month Dhanu (December – January)