  We consider spin effects in two-particle hadronic decays of B_c and B_c^*
mesons into J/psi plus \rho(\pi) in the frame work of hard gluon exchange
model. It is shown that polarization of the J/psi meson is very different in
decays of B_c and B_c^* mesons as well as their decay widths into J/psi plus
\rho(\pi).
