  We calculate one-loop renormalization factors of several quark operators
including bilinear, three- and four-quark operator for domain-wall fermion
action. Since Green functions are constructed for external physical quark
fields, our renormalization method is simple and can be easily applied to
calculation of any quark operators. Our results show that these renormalized
quark operators preserve several chiral properties of continuum massless QCD,
which can be understood by the property of external quark line propagator.
