An all-solid-state battery including a cell laminate including two or more unit cells, and a resin layer covering a side surface of the cell laminate, wherein each unit cell includes a positive electrode current collector layer, a positive electrode active material layer, a solid electrolyte layer, a negative electrode active material layer, and a negative electrode current collector layer laminated in this order, at least one of the positive electrode current collector layer, positive electrode active material layer, solid electrolyte layer, negative electrode active material layer, and negative electrode current collector layer includes extending parts which extend more outwardly from the side surface of the cell laminate than the other layers, and gaps are formed between the extending parts, and the ratio of the compressive modulus of the resin layer to the compressive modulus of the cell laminate is 0.4 or less.