Abstract: A battery case of the present disclosure includes a lower case for housing a battery with the upper side of the lower case opened; and an upper case provided on the upper side of the lower case to cover the battery. The lower case includes a lower case bottom surface on which the battery is placed and a lower case side surface extending upward from the edge of the lower case bottom surface. The lower case side surface includes, on its side where a module terminal of the battery is disposed, a cut part cut downward in such a way that the height of the lower case side surface becomes lower than the height of a position of the module terminal.