A wavelength-division-multiplexed (WDM) radio-over-fiber (RoF) de-multiplexer, which is specially designed for frequency-modulated continuous-wave (FM-CW) signal delivery systems, is newly developed. The characteristics of the developed de-multiplexer are described and then the de-multiplexing performances of 4-channel WDM 32-GHz-band and 8-channel WDM 48-GHz-band FM-CW RoF signals are evaluated with the de-multiplexer.