Provided are a cathode material capable of improving battery characteristics by improving its structural stability, a method of manufacturing the cathode material, and a battery using the cathode material. A cathode comprises a complex oxide represented by Li.sub.aMn.sub.bCr.sub.cAl.sub.1-b-cO.sub.d or Li.sub.1+e(Mn.sub.fCr.sub.gM.sub.1-f-g).sub.1-eO.sub.h. the values lof a through h are within a range of 1.0