Review of the CMS muon detector system

The muon detector system of CMS consists of 3 subdetectors, the barrel drift tube chambers (DTs), the end cap cathode strip chambers (CSCs) and the resistive plate chambers (RPCs). During the last years the layouts of the subdetectors have been optimized by testing several prototypes. Now the project is frozen and the mass production of the chambers has started. Several production centers are coordinating their efforts. The muon system will be completed within September 2005. The final detectors, the construction status and planning and some test of the produced chambers is presented.