A battery comprising: a first electrode collector layer having a first surface, and a second electrode collector layer having a second surface, wherein the first surface of the first electrode collector layer and the second surface of the second electrode collector layer face each other; a plurality of first active material layers which electrically contact the first surface of the first electrode collector layer and are substantially perpendicular to the first surface of the first electrode collector layer; a plurality of second active material layers which electrically contact the second surface of the second electrode collector layer and are substantially perpendicular to the second surface of the second electrode collector layer, wherein the plurality of first active material layers and plurality of second active material layers are alternately arranged in parallel with one another; an electrolyte layer disposed between the plurality of first active material layers and the plurality of second active material layers, between the plurality of first active material layers and the second electrode collector layer, and between the plurality of second active material layers and the first electrode collector layer; and a first conductor layer which electrically contacts the first electrode collector layer, which protrudes substantially perpendicular to the first surface of the first electrode collector layer, and is interposed in the plurality of first active material layers, wherein: the second electrode collector layer is a further second active material layer extending from the plurality of second active material layers, the second electrode collector layer and the plurality of second active material layers are formed of a lithium metal, and the plurality of first active material layers, plurality of second active material layers, and the first conductor layer have a plate shape. a first electrode collector layer having a first surface, and a second electrode collector layer having a second surface, wherein the first surface of the first electrode collector layer and the second surface of the second electrode collector layer face each other; a plurality of first active material layers which electrically contact the first surface of the first electrode collector layer and are substantially perpendicular to the first surface of the first electrode collector layer; a plurality of second active material layers which electrically contact the second surface of the second electrode collector layer and are substantially perpendicular to the second surface of the second electrode collector layer, wherein the plurality of first active material layers and plurality of second active material layers are alternately arranged in parallel with one another; an electrolyte layer disposed between the plurality of first active material layers and the plurality of second active material layers, between the plurality of first active material layers and the second electrode collector layer, and between the plurality of second active material layers and the first electrode collector layer; and a first conductor layer which electrically contacts the first electrode collector layer, which protrudes substantially perpendicular to the first surface of the first electrode collector layer, and is interposed in the plurality of first active material layers, wherein: the second electrode collector layer is a further second active material layer extending from the plurality of second active material layers, the second electrode collector layer and the plurality of second active material layers are formed of a lithium metal, and the plurality of first active material layers, plurality of second active material layers, and the first conductor layer have a plate shape. the second electrode collector layer is a further second active material layer extending from the plurality of second active material layers, the second electrode collector layer and the plurality of second active material layers are formed of a lithium metal, and the plurality of first active material layers, plurality of second active material layers, and the first conductor layer have a plate shape.