  Encouraged by recent discovery of $\Xi_{cc}^{++}$ baryon, we investigate two
body non-leptonic weak decays of doubly charmed, $\Xi_{cc}$, baryons. We
calculate the branching ratios for CKM-favored and suppressed modes in
factorization and pole model approach. We give the first estimates of
nonfactorizable W-exchange contributions using pole model. We find that
W-exchange contributions to $\Xi_{cc}$ decays being sizable can not be ignored.
