We　reported　the　observation　of　whispering　gallery　modes　(WGMs)　from　silicon　microspheres　in　C-band　with　a　biconical　tapered　fiber-microsphere　coupled　system.　We　experimentally　studied　the　resonant　transmission　spectra　with　broadband　light　source　and　optical　spectrum　analyzer,　and　measured　the　X-ray　diffraction　pattern　of　silicon　microspheres.　We　analyzed　the　WGMs　of　silicon　microspheres,　the　full-width　at　half-maximum　was　0.12　nm,　and　the　dip　of　the　transmission　spectra　was　3.5　dB　(55%　of　the　incident　power).　The　Q　factor　of　the　silicon　microsphere　was　1.3　\times　10　^{4}.　The　Raman　gain　coefficient　in　silicon　is　rather　strong　and　the　energy　density　of　microsphere　resonator　is　rather　high,　so　the　silicon　microsphere　resonator　possesses　broad　application　prospect　in　optical　communication　fields,　including　filter,　modulator,　switch,　wavelength　converter,　amplifier,　Raman　laser　source,　and　so　on.　©　1989-2012　IEEE.