The state's 3rd District Appellate Court on Monday shot down Peterson's effort to be released.
Peterson has been in jail since May 2009 when bond was set at $20 million after he was arrested for murder in the 2004 death of his third wife, Kathleen Savio. He's pleaded not guilty.
An attorney for Peterson says the next step is to take the case to the Illinois Supreme Court.
Peterson is also suspected in the unsolved disappearance of his fourth wife, Stacy.