An energy storage apparatus includes an energy storage device and a spacer, in which the spacer has a main body portion, and a third protrusion having a shape that protrudes in a first direction that is a direction from the main body portion to a side surface or a bottom surface of the energy storage device, the protrusion not abutting on a surface of the energy storage device that faces the first direction, and an end edge of the main body portion in the first direction is positioned away in the first direction relative to the surface of the energy storage device that faces the first direction.