  We discuss the nonfactorization effects in $B\to J/\Psi+X_{s}$, which is
similar to the nonperturbative effect found by Voloshin in the decay $B\to
\gamma +X_{s}$. The QCD sum rule has been used to estimate the hadron matrix
elements. We find that the correction from this effect is very large and the
large discrepancy between the theory and the experimental data can be reduced
considerably.
