BATTERY PACK

A battery pack includes a sub-end plate disposed between a cell stack and a main end plate. The sub-end plate includes a first surface that faces the cell stack, and a second surface that faces the main end plate. A contact portion that protrudes toward and comes into contact with the main end plate, and a non-contact portion that is positioned laterally with respect to the contact portion, and forms a space between the non-contact portion and the main end plate and does not come into contact with the main end plate at least when the main end plate is not elastically deformed in a direction away from the cell stack by being pressed by the contact portion are formed on the second surface.