A battery includes an electrode layer, a counter-electrode layer placed opposite to the electrode layer, a solid electrolyte layer located between the electrode layer and the counter-electrode layer, and an insulating layer located between the electrode layer and the solid electrolyte layer. The electrode layer includes a collector and an electrode active material layer located between the collector and the solid electrolyte layer and between the collector and the insulating layer. The insulating layer is located at ends of the electrode active material layer in plan view. The insulating layer is located in a region where a length of the electrode active material layer from an outer periphery in plan view is less than or equal to 1 mm.