BATTERY PACK

A metallic accommodating frame (60) is the metallic accommodating frame for a lead storage battery (1) that accommodates the lead storage battery (1) including an electrode group (4) in which a positive electrode plate (9) and a negative electrode plate (10) are stacked with a separator (11) interposed therebetween, and a battery case (2) for accommodating the electrode group, in which the positive electrode plate and the negative electrode plate are formed by filling an electrode material into a grid body (20) having a protrusion (24) that projects outwardly from a frame (21) forming an outline in a plan view. The metallic accommodating frame includes: a conductive housing (61) having an opening (61a) that opens horizontally, and accommodating the lead storage battery (1) therein; and a first protector (71) that is disposed between a first surface (2c) facing the protrusion among surfaces forming the battery case of the lead storage battery accommodated in the housing and the housing, and is made of an insulating material.