BATTERY PACK

A battery pack includes: a plurality of stacked battery cells (11); a first member (23) having a longitudinal plate portion (27) and a lateral plate portion (26), the longitudinal plate portion (27) being in abutment with a battery cell (11) in a stacking direction of the battery cells (11), reaction force in the stacking direction of the battery cells (11) being applied to the longitudinal plate portion (27) from the plurality of battery cells (11), the lateral plate portion (26) protruding from the longitudinal plate portion (27) in a direction of the reaction force; and a second member (31) overlapping with the lateral plate portion (26) in a thickness direction of the lateral plate portion (26); and a connection member (50) that connects the lateral plate portion (26) to the second member (31).