Pragya took the holy dip at Ram ghat amid tight security, her aide Bhagwan Jha told PTI.
Yesterday, she called off her two-day-long hunger strike after the authorities made the arrangements for her visit to the Kumbh Mela.
She had started hunger strike at the Government-run Pandit Khushilal Sharma Ayurvedic Hospital in Bhopal as the authorities earlier did not allow her to take part in the Kumbh Mela despite a Dewas court's order.
Last Friday NIA dropped all the charges against her and five others in the Malegaon blast case.
Seven people were killed in a blast in Malegaon town of Maharashtra on September 29, 2008.
Pragya is also being tried for allegedly masterminding the killing of RSS pracharak Sunil Joshi in Dewas district in 2007.