Battery pack having end plates

Provided is a battery pack including a pair of end plates facing each other, a plurality of battery cells arrayed between the end plates, and a pair of side plates each extending along a length of the plurality of battery cells, and coupled to the end plates, wherein each of the end plates includes a base plate, bending portions bent from each edge of the base plate in a direction away from the plurality of battery cells, each bending portion having a reinforcing bead unit, and a flange portion connected to the base plate at each bending portion. According to one or more embodiments of the present invention, deformation of the battery pack may be efficiently suppressed and deterioration of a function of a battery cell may be prevented by blocking volume expansion due to recharging and discharging operations of the battery cell.