All-solid-state battery

An all-solid-state battery comprising:

• an exterior can having a bottom with a recessed portion recessed toward an outside and a cylindrical side wall;
• a seal can having a flat portion and a peripheral wall for covering an opening of the exterior can;
• a power generation element including a cathode layer, an anode layer and a solid electrolyte layer located between the cathode layer and the anode layer, the power generation element located between an inner bottom surface of the recessed portion of the exterior can and the flat portion of the seal can;
• a gasket to be crimped between the cylindrical side wall of the exterior can and the peripheral wall of the seal can;
• and
• a recoverable conductive sheet made of a foamed material located between the power generation element and at least one of the inner bottom surface of the recessed portion and the flat portion of the seal can,
• wherein the foamed material is made of an expanded graphite.