ALL-SOLID-STATE BATTERY

An all-solid-state battery includes an electrode assembly including a solid electrolyte layer, a first battery unit having a first negative electrode and a first positive electrode, and a second battery unit having a second negative electrode and a second positive electrode, in which the first negative and positive electrodes and the second negative and positive electrodes are respectively stacked with the solid electrolyte layer interposed therebetween. The all-solid-state battery further includes a first external electrode; a second external electrode; a third external electrode; and a fourth external electrode, in which the second battery unit is disposed to be adjacent to at least one the fifth surface or the sixth surface of the electrode assembly, and the first battery unit is located further inside than the second battery unit in the third direction.