NOVELTY - The process comprises heat-melting a solid electrolyte at 100-200 degrees C, coating a first heated liquid on a first layer, which is a layer of a positive electrode active material layer of a positive electrode (14) and a negative electrode active material layer of a negative electrode (16) to form a first heated liquid layer, and coating a second heated liquid on a second layer which is the other layer of the positive electrode active material layer of the positive electrode and the negative electrode active material layer of the negative electrode to form a second heated liquid layer.    USE - The process is useful for manufacturing a laminated secondary battery.    ADVANTAGE - The process is capable of economically and reliably manufacturing the secondary battery with excellent repeated charge/discharge cycle property, high energy density and battery capacity, and increased productivity and crystallinity and without any liquid leakage, and prevents moisture or oxygen outside the battery from permeating the battery.    DETAILED DESCRIPTION - The process comprises heat-melting a solid electrolyte at 100-200 degrees C, coating a first heated liquid on a first layer, which is a layer of a positive electrode active material layer of a positive electrode (14) and a negative electrode active material layer of a negative electrode (16) to form a first heated liquid layer, coating a second heated liquid on a second layer which is the other layer of the positive electrode active material layer of the positive electrode and the negative electrode active material layer of the negative electrode to form a second heated liquid layer, coating the heat-melted solid electrolyte on the first liquid layer to form a solid electrolyte layer, and combining the solid electrolyte layer with a second layer through the second heated liquid layer. The secondary battery comprises a positive electrode, a negative electrode, and a solid electrolyte layer. The positive electrode comprises a first current collector (15), and a positive electrode active material layer containing a positive electrode active material. The negative electrode comprises a second current collector (15'), and a negative electrode active material layer containing a negative electrode active material. The solid electrolyte layer is interposed between the positive electrode active material layer and the negative electrode active material layer. The heated liquid has a coating amount of 1-50 g/m2. The solid electrolyte layer contains a polymer compound, an organic solvent and a lithium salt. The organic solvent contained in the solid electrolyte layer is same as an organic solvent contained in the second heated liquid. The first current collector and second current collector each comprise a metal foil and a resin layer. The resin layer is provided on a surface of the first current collector and second current collector opposite to the positive and negative electrode active material layers.    DESCRIPTION OF DRAWING(S) - The diagram shows a schematic view of a process for manufacturing the secondary battery.    Positive electrode active material layer surface side (13)    Negative electrode active material layer surface side (14) Positive electrode (13')    First current collector (15)    Second current collector (15')    Negative electrode. (16)