A solid state battery that includes: a solid state battery laminate including at least one battery constituent unit, the at least one battery constituent unit including a positive electrode layer, a negative electrode layer, and a solid electrolyte layer interposed between the positive electrode layer and the negative electrode layer; a first external terminal on a first side surface of the solid state battery laminate; a second external terminal on a second side surface of the solid state battery laminate, the second side surface facing the first side surface across the solid state battery laminate; and an exterior member covering the solid state battery laminate, the exterior member including one or more pores on an inner side of the exterior member adjacent to the solid state battery laminate.