  We present the recent investigation of the $\Delta S = 1$ effective weak
chiral Lagrangian within the framework of the instanton-induced chiral quark
model. Starting from the effective four-quark operators, we derive the
effective weak chiral action by integrating out the constituent quark fields.
Employing the derivative expansion, we obtain the effective weak chiral
Lagrangian to ${\cal O} (p^4)$ order with low energy constants.
