Baldwin has previously revealed that he plans to leave after the sixth season but he has now suggested that the series itself will finish then.
Speaking to New York Magazine, he said: "I will tell you one thing. And that is our show next year is our last year of the show.
"Our contracts are expired [in 2012] and Tina [Fey] is going to have a big career directing films and writing. She's going to be the next Elaine May. She'll be great."
Representatives for Fey have not yet commented on the reports.
The current season of 30 Rock airs on Thursdays at 10/9c on NBC.
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