For a lithium ion secondary battery and the positive electrode of the lithium-ion secondary battery

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Disclosed is a positive electrode containing a sulfur-based positive electrode active substance and capable of increasing discharge rate characteristics and the cycle characteristics of lithium ion secondary batteries. The positive electrode for lithium ion secondary batteries contains a sulfur-based positive electrode active substance which contains carbon (C) and sulfur (S), and a conductive material which contains sulfur (S), wherein at least one part of said conductive material is a sulfide of at least one metal selected from the group consisting of the fourth-period metals, fifth-period metals, sixth-period metals, and rare earth elements.