Battery casing

A battery casing (7) for receiving a plurality of battery modules (8) for driving an electric vehicle (1), including: a tray member (10) made from a resin and supporting the battery modules (8); a support member (30) provided under a lower face of the tray member (10) and supporting the tray member (10) from a bottom thereof; a standing wall (11a,11b,13F,13R) provided so as to stand in the tray member (10); and a sheet metal tray member (40) made from a sheet metal and placed on the tray member (10). The sheet metal tray member (40) includes a plurality of sheet metal recesses (41) that receive the battery modules (8) and a sheet metal flange (42) placed on an upper face of the standing wall (11a,11b,13F,13R). The standing wall (11a,11b,13F,13R) includes a through hole (6) formed through the standing wall (11a,11b,13F,13R) in a standing direction of the standing wall. The support member (30) and the sheet metal flange (42) are fastened to the tray member (10) by means of a sheet metal fastening member (50) provided through the through hole (6).