The 75-year-old Scottish actor underwent the operation a few weeks ago in New York, spokesman James Barron said.
"He's very fit — he's 100 percent plus," Barron said of the former James Bond actor, who won a 1988 Academy Award as supporting actor for "The Untouchables." In 2000, he was knighted by Queen Elizabeth II.
Connery told The Sunday Times that he "was opened in five places."
His brother, Neil, told the newspaper that "as far as I'm led to believe, the tumor was benign. He seems to be quite upbeat about it."
Connery, an ardent Scottish nationalist, is scheduled to record a voiceover for a political program for the pro-independence Scottish National Party. He also plans to attend Tartan Day festivities in New York in April, party leader Alex Salmond said.