  We present the results of a lattice QCD calculation of the form factor
relevant to B-->K*gamma decay. Our final value, T(0) = 0.24 +/-
0.03(+0.04/-0.01), is obtained in the quenched approximation, and by
extrapolating T(q2=0;H--> K*)MH^(3/2) from the directly accessed H-heavy mesons
to the meson B. We also show that the extrapolation from B-->K*gamma* to
B-->K*gamma leads to a result consistent with the one quoted above. On the
other hand, our results are not accurate enough to solve the SU(3) flavor
breaking effects in the form factor and we quote T(q2=0;B-->
K*)/T(q2=0;B-->rho)=1.2(1), as our best estimate.
