Method of manufacturing solid-state battery

A method of manufacturing a solid-state battery having a laminated structure in which a negative electrode layer, a solid electrolyte layer, and a positive electrode layer are laminated in this order, the positive electrode layer including a positive electrode active material layer, and an insulating frame being disposed at an outer edge of the positive electrode active material layer in a direction orthogonal to a lamination direction of the laminated structure, the method comprising:

• (A) a positive electrode active material layer forming step of punching and cutting out the positive electrode active material layer in a dry state;
• (B) an insulating frame forming step of punching and cutting out the insulating frame in a dry state;
• (C) a placement step of placing the positive electrode active material layer formed in the positive electrode active material layer forming step (A) on an inner surface side of the insulating frame formed in the insulating frame forming step (B);
• (D) a first pressing step of pressing the insulating frame and the positive electrode active material layer after the placement step (C);
• (E) a lamination step of laminating at least the solid electrolyte layer on the positive electrode active material layer and the insulating frame;
• and
• (F) a second pressing step of pressing a laminate obtained in the lamination step (E).