Trinmool Congress vice-president Mukul Roy made the announcement after the party's organisational polls in the presence of Banerjee at the Netaji Indoor Stadium here.
After her re-election, Banerjee said, "It would have been better if the responsibility was given to some other person. I am busy with other works."
"I prefer to be a worker because the workers are the party's wealth, not the leaders. TMC works for the people," she said.