Polling for the 230-member Madhya Pradesh legislative assembly began at 8 a.m. Monday, an official said.
Over 4.6 crore (46 million) voters are eligible to exercise their right to franchise. The results will be out Dec 8.
In three constituencies in Maoist-affected Balaghat district, voting began an hour earlier and would conclude at 3 p.m.
For the first time, the none of the above (NOTA) option will be available to voters.
In the 2008 polls, the Bharatiya Janata Party won 143 seats while the Congress won 71.
