  I review the status of lattice simulations relevant for phenomenological
studies of B-physics. Results for much-studied quantities such as f_B, B_B and
form-factors for semileptonic decays are presented as well as those for
quantities which have begun to be studied only recently (such as B-lifetimes).
The improvement in the precision of the determinations of the mass of the
b-quark, which has been made possible by new results for perturbative
coefficients, is discussed. Finally I describe new ideas being developed with
the aim of making computations of two-body non-leptonic decays possible.
