About 25, 083 voters are expected to exercise theirfranchise to elect their representative from the constituency.
The polling began at 7 am and would end at 3 pm, the sourcessaid.
The byelection was necessitated due to the death ofsitting Congress MLA and former assembly Speaker SBudhichandra whose son S Ranjan is contesting on the Congressticket.
The other two candidates are K Sarat (Trinamool Congress)and Kh Ranjit (Independent).
Counting of votes would be held on February 17, sourcessaid.