  We discuss a possibility that a superconformal dynamics induces the emergence
of a global $U(1)_{\rm PQ}$ symmetry to solve the strong CP problem through the
axion. Fields spontaneously breaking the $U(1)_{\rm PQ}$ symmetry couple to new
quarks charged under the ordinary color $SU(3)_C$ and a new $SU(N)$ gauge
group. The theory flows into an IR fixed point where the $U(1)_{\rm PQ}$
breaking fields hold a large anomalous dimension leading to the suppression of
$U(1)_{\rm PQ}$-violating higher dimensional operators. The spontaneous
breaking of the $U(1)_{\rm PQ}$ makes the new quarks massive. The $U(1)_{\rm
PQ}$ symmetry is anomalous under the $SU(3)_C$ but not under the $SU(N)$ so
that the axion couples to only the color $SU(3)_C$ and the usual axion
potential is generated. We also comment on a model that the $U(1)_{\rm PQ}$
breaking fields are realized as meson superfields in a new supersymmetric QCD.
