Combustion oxidation catalysts were prepared by impregnation of oxides of copper, chrome, nickel and cobalt on aluminum-deficient mordenites(SiO₂/Al₂O₃=22), which were redox-treated in reduc-tion/oxidation atmosphere at 500℃ and 750℃, respectively. For these catalysts methane combustion was carried out. X-ray diffraction analysis indicates that the metal oxides were dispersed with the av-erage particle size of about 20-30nm in the form of CuO, Cr₂O₃, Co₃O₄ and NiO. Redox-treated in reduc-tion/oxidation atmosphere at 750℃ reduced the crystallinity of the mordenite, but chrome addition im-proved the stability. This improvement in stability may be explained with the effect of remaining chrome ions in the mordenite pores which is formed when impregnating iits salt as well as reoxidation pretreat-ment. On the catalysts containing two kinds of metal oxides, XRD study informs that the oxides were dipersed individually without formation of new oxide compounds. The catalytic activities for 500℃ were appeared as the following order; CuO/DM>Cr₂O₃/DM>Co₃O₄/DM, NiO/DM. However catalytic activi-ties for the catalysts redox-treated at 750℃ was much reduced compared with the activities at 500℃, which is also explained with the reduction of mordenite crystallinity which makes the reducton of metal ion concentration and also of copper oxide particle size.