  We investigate the $\Delta S=0$ effective chiral Lagrangian from the
instanton vacuum. Based on the $\Delta S=0$ effective weak Hamiltonian from the
operator product expansion and renormalization group equations, we derive the
strangeness-conserving effective weak chiral Lagrangian from the instanton
vacuum to order ${\cal O}(p^2)$ and the next-to-leading order in the $1/N_c$
expansion at the quark level. We find that the quark condensate and a dynamical
term which arise from the QCD and electroweak penguin operators appear in the
next-to-leading order in the $1/N_c$ expansion for the $\Delta S =0$ effective
weak chiral Lagrangian, while they are in the leading order terms in the
$\Delta S = 1$ case. Three different types of the form factors are employed and
we find that the dependence on the different choices of the form factor is
rather insensitive. The low-energy constants of the Gasser-Leutwyler type are
determined and discussed in the chiral limit.
