Pettathullal (പേട്ട തുള്ളൽ), also known as Pettat kettu (പേട്ട കെട്ട്), is a historic ritualistic dance held annually on the 27th of Dhanu at Erumely, in the district of Kottayam, in the Indian state of Kerala.

It is believed that lord Vishnu himself arrives from Ambalappuzha Sree Krishna temple on his mount Garuda to witness the ''thullal.

The custom of Pettathullal starts with 'Prayashchitham' or atonement which is done to seek forgiveness for the intentional and unintentional sins committed during the vrata kalam (fasting period) by placing a coin and betel leaf on the holy irumudikettu or travel kit.

They dress like tribes with their bodies and faces smeared by colours and charcoal and carry weapons such as sarakkol (arrows) and wooden maces.

The thullal is accompanied by instrumental music such as Chenda melam, Nagaswaram, Pambamelam, mantras, and hymns that begin at the Petta Sree Dharmasastha temple (Kochambalam) adjacent to the Vavar masjid.