VEHICLE LOWER PART STRUCTURE

To provide a lower part structure of a vehicle 1 which enables improvement of support rigidity of a rear suspension 11.SOLUTION: A vehicle lower part structure includes: a pair of left and right suspension support parts 12 which swingably supports a front end part 111a of a trailing arm 111 of a rear suspension 11; and a rear part width direction frame member 74 which is a high rigidity member extending in a vehicle width direction between the suspension support parts 12. The suspension support part 12 is formed into a substantially portal shape opening at the vehicle rear in a bottom view with an inner wall part 122, an outer wall part 121, and a front surface part 123 and supports the front end part 111a of the trailing arm 111 through a support pin 125 inserted into the inner wall part 122 and the outer wall part 121. The inner wall parts 122 of the suspension support parts 12, which are located at the inner side in the vehicle width direction, are connected in the vehicle width direction through the rear part width direction frame member 74.SELECTED DRAWING: Figure 4 【課題】リヤサスペンション１１の支持剛性を向上できる車両１の下部構造を提供することを目的とする。【解決手段】リヤサスペンション１１のトレーリングアーム１１１の前端部１１１ａを揺動自在に支持する左右一対のサスペンション支持部１２を備えた車両の下部構造であって、サスペンション支持部１２の間を車幅方向に延びる高剛性部材である後部幅方向フレーム部材７４を備え、サスペンション支持部１２が、内壁部１２２、外壁部１２１、及び前面部１２３で車両後方が開口した底面視略門型形状に形成されるとともに、内壁部１２２、及び外壁部１２１に挿通された支持ピン１２５を介して、トレーリングアーム１１１の前端部１１１ａを支持する構成であり、車幅方向内側に位置するサスペンション支持部１２の内壁部１２２が、後部幅方向フレーム部材７４を介して、車幅方向に連結されたことを特徴とする。【選択図】図４