NOVELTY - The structure (7) has a positive electrode (4) comprising a positive electrode active material layer (3) formed on a current collector (2). A solid electrolyte (6) contains inorganic particles including lithium ion conductivity, organic polymer and polymer gel in which the organic polymer binds the inorganic particles and impregnated with the polymer gel. The polymer gel holds electrolyte solution including lithium ion conductivity and impregnated into the organic polymer. The positive electrode active material layer is integrated with the electrolyte by using the organic polymer as a medium.    USE - Electrolyte-positive electrode structure for use in a lithium ion secondary battery (claimed).    ADVANTAGE - The solid electrolyte can be formed into a thin film as the positive electrode active material layer ensures desired strength of the solid electrolyte and avoids damage, so that thickness of the lithium ion secondary battery can be reduced. The lithium ions can easily conduct between the solid electrolyte and the positive electrode active material layer to reduce interfacial resistance between the solid electrolyte and the positive electrode active material layer to suppress excess voltage as the contact between the solid electrolyte and the positive electrode active material layer of the positive electrode is better, thus developing excellent capacity and output. The structure can suppress oxidation-reduction reaction at an interface of the solid electrolyte and a negative electrode active material layer from occurring aside from the cell reaction and prevent the solid electrolyte from being reduced and deteriorated when the electrolyte-positive electrode structure is used in the lithium ion secondary battery.    DESCRIPTION OF DRAWING(S) - The drawing shows a cross-sectional view of a lithium ion secondary battery comprising an electrolyte-positive electrode structure.    Current collector (2)    Positive electrode active material layer (3)    Positive electrode (4)    Solid electrolyte (6)    Electrolyte-positive electrode structure (7)