Charles Manson is out of Prison ….

Charles Manson has been taken out of the prison where he will spend the rest of his life … into a hospital … TMZ has learned.

Manson left California’s Corcoran State Prison on Tuesday to get treatment for an undisclosed ailment. We’re told he’s at a Bakersfield hospital — about an hour away from the penitentiary.

Manson is currently serving 9 life sentences for conspiracy to commit the infamous Manson Family murders in 1969.