ALL-SOLID-STATE BATTERY

An all-solid-state battery includes an electrode assembly in which a solid electrolyte layer, a positive electrode layer, and a negative electrode layer are alternately stacked; a negative electrode terminal connected to the negative electrode layer; a positive electrode terminal connected to the positive electrode layer; and an insulator disposed to contact an end portion of the negative electrode layer in the first direction, and at least one of a negative electrode ion concentration portion and a negative electrode electric field concentration portion is disposed to be spaced apart from a negative electrode longitudinal end portion disposed on the same negative electrode reference surface.