Published Friday, May 2, 2014 | 4:17 p.m.
Updated Saturday, May 3, 2014 | 3:30 p.m.
Editor's note: A Hard Rock Hotel spokeswoman disputed the TMZ report below, saying, "Mr. Affleck, a valued guest of Hard Rock Hotel & Casino, is not banned from our property and is welcome back any time."
Ben Affleck's blackjack days are over ... at least at the Hard Rock in Vegas — because he was just banned FOR LIFE from playing the game at the casino ... after security says they caught him counting cards.
Affleck was in Sin City earlier this week with wife Jennifer Garner. We're told he planned the Vegas trip as a romantic getaway before he ships off to Detroit for several months to shoot his new Batman movie.