A positive electrode for a nonaqueous electrolyte secondary battery using a positive electrode active material mixture according to an embodiment of the invention includes a positive electrode active material capable of intercalating and deintercalating a lithium ion, a conductive agent and a binder, in which the positive electrode active material is produced by coating cobalt-based lithium composite oxide represented by a general formula: LiaCo1-sM1sO2 with lithium nickel cobalt manganese oxide represented by a general formula: LibNitCouMnvO2, the ratio r1/r2 of the average particle diameter r1 of the cobalt-based lithium composite oxide and the average particle diameter r2 of the lithium nickel cobalt manganese oxide is 2≦r1/r2≦50, and the average particle diameter r2 of the lithium nickel cobalt manganese oxide is 0.5 μm≦r2≦20 μm. By containing such a constitution, a positive electrode for a nonaqueous electrolyte secondary battery in which even when the charging discharging is repeated at a high potential of 4.5 V based on lithium, not only is the retention characteristics in a charged state excellent, but also the enhancing the capacity and the energy density of the battery can be achieved; and a production method thereof, can be provided.