  The purpose of this study is to show that monopoles induce the chiral
symmetry breaking. In order to indicate the evidence, we add one pair of
monopoles with magnetic charges to the quenched SU(3) configurations by a
monopole creation operator, and investigate the propaties of the chiral
symmetry breaking using the Overlap fermion. We show that instantons are
created by the monopoles. The pseudoscalar meson mass and decay constant are
computed from the correlation functions, and the renormalization constant
$Z_{S}$ is determined by the non perturbative method. The renormalization group
invariant chiral condensate in $\overline{\mbox{MS}}$-scheme at 2 [GeV] is
evaluated by the Gell-Mann-Oakes-Renner formula, and the random matrix theory.
Finally, we estimate the renormalization group invariant quark masses $\bar{m}
= (m_{u} + m_{d})/2$, and $m_{s}$ in $\overline{\mbox{MS}}$-scheme at 2 [GeV].
The preliminary results indicate that the chiral condensate decreases and the
quark masses become slightly heavy by increasing the number of monopole
charges.
