ENERGY STORAGE APPARATUS

An energy storage apparatus includes an energy storage device, an end plate arranged in a first direction of the energy storage device, and a side plate extending in the first direction and joined to the end plate, in which in at least one of the end plate or the side plate, a protruding portion is provided in at least one corner portion at which the first direction and a second direction which is orthogonal to the first direction intersect each other, and the protruding portion is configured such that a space, which opens on a side of the energy storage device, is defined by a deformation portion of at least one of the end plate or the side plate projected toward an outer side.