An energy storage apparatus includes: an energy storage device; a spacer disposed on one side of the energy storage device in a first direction, the spacer including a pair of wall portions; and a measuring part for measuring a state of the energy storage device, the measuring part disposed on one side of the energy storage device in a second direction which intersects with the first direction. The wall portions include a first wall portion disposed on the one side of the energy storage device in the second direction and a second wall portion disposed on the other side of the energy storage device opposite to the one side of the energy storage device. The energy storage device is arranged at a position where a distance between the energy storage device and the first wall portion is set shorter than a distance between the energy storage device and the second wall portion.