  We investigate the cosmic variance of the skewness of the cosmic microwave
background (CMB) anisotropies in an inflationary model which leads to the
baryon isocurvature scenario for the cosmic structure formation. In this model,
the baryon number fluctuations are given by a sinusoidal function of a random
Gaussian field. We find that the skewness is very small in comparison with that
of the fluctuations which obey Gaussian statistics.
