  We calculate the divergences of the generating functional of quenched Chiral
Perturbation Theory at one loop, and renormalize the theory by an appropriate
definition of the counterterms. We show that the quenched chiral logarithms can
be reabsorbed in the renormalization of the B_0 parameter which, at lowest
order, is proportional to the vacuum expectation value of the scalar quark
density. Finally, we calculate several quantities at one loop to analyze the
modifications induced by quenching in the finite part of the one-loop
corrections. We point out that some of the finite loop corrections may diverge
in the chiral limit.
