PURPOSE: To provide suspension member structure with cross member structure which can trail rotation displacement of a side support member.

CONSTITUTION: A transverse member 1 is mounted in the vehicle body width direction and a pair of side support members 2 are extended in the vehicle front and rear direction respectively from the left and right both ends of the transverse member 1. A cross member 7 is mounted laterally so as to connect front ends 2a of the left and right side support members 2 in the vehicle body width direction. The cross member 7 comprises a flat board member extending in the vehicle body width direction and arranged in such a way as facing its board thickness direction approximately longitudinally and connection parts 7a of its both end sides are so formed as to be twisted approximately 90° and their surfaces are mounted on the tip face of the front ends 2a of the side support members 2.