The judges chambers is a room that serves as the judges office. It contains a desk where the judge works when the judge is not presiding over a proceeding in the courtroom.
The chambers is where a judge reads motions and other papers that are filed in a case that has been assigned to the judge.
The judge also uses the chambers to meet with attorneys and other people about court business.
The courtroom is open to the public, but the judges chambers is private. People usually must have the judges permission to enter his or her chambers.