  Two-body decays of B mesons are studied by decomposing their amplitude into a
sum of factorizable and non-factorizable ones. The former is estimated by using
the naive factorization while the latter is calculated by using a hard pion (or
kaon) approximation in the infinite momentum frame. It is seen that the
non-factorizable contribution is small but not negligible in color favored
decays while it is more important in color mismatched decays.
