  We propose a primeval baryon isocurvature model in the context of the
Affleck-Dine (AD) baryogenesis mechanism. Quantum fluctuations of the AD field
during inflation produce fluctuations in the baryon number. We obtain a model
which gives both the appropriate baryon to entropy ratio of the order
$10^{-11}$ and the gaussian baryon isocurvature perturbation of the order
$10^{-3}$ at the break of the spectrum 1 Mpc with the steep spectrum $n=-1.5$
on large scales >1 Mpc.
