Patent ID: 8905437

Claim:
A cross member extending in a vehicle width direction and having opening portions at end portions in the vehicle width direction, comprising: a cross member main body having an inner surface opened in one direction in a cross section perpendicular to the vehicle width direction at the end portion in the vehicle width direction; a closing plate joined to the cross member main body in such a manner as to close the inner surface of the cross member main body; and a cylindrical spacer disposed in an internal space formed by the cross member main body and the closing plate at the end portion of the cross member main body in the vehicle width direction, and joined to the cross member main body in such a manner as to form a through-hole in a direction perpendicular to the vehicle width direction and to the direction in which the cross member main body is opened, wherein the end portion of the cross member main body in the vehicle width direction includes a recessed portion formed on a side of the cross member main body opposite to a side on which the cross member main body is opened, the recessed portion being recessed toward an inner surface side.