An experimental validation for millimeter-wave(mm-wave) channel measurement is presented in a reverberation chamber (RC) at 28 GHz band. A 28 GHz channel sounder and a vector network analyzer were used to measure complex channel transfer functions at the specific position of the rotating modestirrer in the RC. To demonstrate the experimental validation according to different antenna directions and polarizations, we have compared cumulative distribution functions for each case with Rayleigh distribution.