Patent ID: 7261322

Claim:
A coupling structure of side and cross members, comprising: a side member having a vertical wall and being disposed along a longitudinal direction of a vehicle body; a component fixed to an outer surface of the vertical wall of the side member in a vehicle transverse direction by use of attachment members penetrating the vertical wall; a cross member having a side wall, an upper wall extending from an upper end of the side wall, and a lower wall extending from a lower end of the side wall, the cross member being disposed along the vehicle transverse direction; and a gusset having a vertical plate fixed to the vertical wall of the side member, an upper horizontal plate that extends inward in the vehicle transverse direction from an upper end of the vertical plate and is fixed to the upper wall of the cross member, and a lower horizontal plate that extends inward in the vehicle transverse direction from a lower end of the vertical plate and is fixed to the lower wall of the cross member, the gusset coupling an end of the cross member in the vehicle transverse direction with the side member, wherein the vertical plate of the gusset has ribs protruding inward in the vehicle transverse direction, the ribs form and define recessed parts on an outer surface of the vertical plate in the vehicle transverse direction, and parts of the attachment members, which project from an inner surface of the vertical wall of the side member in the vehicle transverse direction, are housed in the recessed parts and therefore the vertical plate of the gusset is fixed in a state of coming into surface contact with the inner surface of the vertical wall of the side member in the vehicle transverse direction.