  Some recent results of lattice QCD calculations which are relevant for the
phenomenology of the Standard Model are reviewed. They concern the lattice
determinations of quark masses, studies of K-Kbar and B-Bbar mixings, and a
prediction of the B_s-mesons lifetime difference. The results of a recent
analysis of the CKM unitarity triangle, which is mostly based on the lattice
calculations of the relevant hadronic matrix elements, are also presented.
