Shah is the brother of BJP leader and Madhya Pradesh Food and Civil Supplies Minister Vijay Shah.
"Instead of Rahul Chouhan, now Shah will contest from Betul," a Congress leader said today.
Shah joined Congress about a fortnight ago. State Congress chief Arun Yadav had denied at the time, in Rahul Chouhan's presence, that the party would change its candidate from Betul.
Shah, who opted for voluntary retirement from a nationalised bank to join BJP, too had said he was not eyeing the Betul seat.
Shah today confirmed that he would be the party's candidate from Betul. He said he would file nomination today.
Voting would be held for Betul in the third phase of Lok Sabha polls, on April 24.