  We study the effective monopole action obtained in the Maximal Abelian
projection of quenched SU(2) lattice QCD. We determine the quadratic part of
the lattice action using analytical blocking from continuum dual superconductor
model to the lattice model. The leading contribution to the quadratic action
depends explicitly on value of the monopole condensate. We show that the
analytical monopole action matches the numerically obtained action in quenched
SU(2) QCD with a good accuracy. The comparison of numerical and analytical
results gives us the value of the monopole condensate in quenched SU(2) QCD,
243(42) MeV.
