Abstract: The present invention relates to a suspension member attaching structure for attaching a suspension member to a vehicle body structure member. A lower reinforcing member 5 is connected to the upper surface of a bottom portion 2C of a front sub-frame 2, which is a vehicle body structure member, by welding or the like, an upper reinforcing member 6 having an upper attachment flat portion 6C located at an intermediate height position of the front sub-frame 2 is provided on the front sub-frame 2, connection Y between the upper reinforcing member 6 and the upper part of a bolt 3 is provided by direct arc welding or the like, and connection X between a collar portion 4 formed at an intermediate portion of the bolt 3 and the lower reinforcing member 5 are provided by arc welding or the like. Thereby, the lower part of the bolt 3 is caused to pass through the lower reinforcing member and the bottom portion 2C of the front sub-frame 2 and is projected from these two members.