  We perform an exploratory study of the operator product expansion of the
quark propagator on the lattice at short distance in coordinate space. This
permits a simple determination of the quark condensate, <qq>^MS(2 GeV)=(-265\pm
5\pm 22 MeV)^3, and of the renormalization constant of the quark field, Z^MS(2
GeV)=0.871 \pm 0.003 \pm 0.020. This new method also provides a remarkable
non-perturbative test of the OPE predictions at short distance in QCD.
