Chidambaram was among the 41 winners declared elected unopposed to Rajya Sabha earlier this month.
“Following my election to the Rajya Sabha from the state of Tamil Nadu, I am required to resign my seat from the state of Maharashtra. Accordingly, today I tendered my resignation from the seat from the state of Maharashtra,” Chidambaram said in a tweet.
“The Hon’ble Chairman of the Rajya Sabha has accepted my resignation. I was honoured to represent the state of Maharashtra. I wish the people of Maharashtra the very best in the future, peace and prosperity,” the former Union minister said.