REAR VEHICLE BODY STRUCTURE FOR VEHICLE

To enhance the support rigidity of a rear suspension, and as a result, to improve steering stability.SOLUTION: A rear vehicle body structure for a vehicle comprises: a first frame 43 extending so as to couple a rear-end lower portion of a connection body 30 consisting of a side sill 3 and a pillar 35 and a lower-arm front support portion 21 of a rear side housing 10, and having a closed cross-sectional space defined therein; a second frame 45 extending so as to couple a rear-end lower portion of a floor tunnel 81 protruding in a vehicle upward direction along forward and backward directions of the vehicle in a middle portion in a vehicle width direction of a vehicle body bottom surface portion and the lower-arm front support portion 21a, and having a closed cross-sectional space defined therein; and a third frame 44 extending so as to couple a rear-end upper portion of the floor tunnel 81 and a lower-arm front support portion 21a and having a closed cross-sectional space defined therein.SELECTED DRAWING: Figure 1 【課題】リヤサスペンションの支持剛性を高め、結果として操縦安定性の向上を図ること。【解決手段】サイドシル３およびピラー３５から成る結合体３０の後端下部と、リヤサイドハウジング１０のロアアーム前側支持部２１ａとを連結するように延びるとともに、閉断面空間が内部に構成された第１フレーム４３と、車体底面部の車幅方向中央部において車両前後方向に沿って車両上方に膨出するフロアトンネル８１の後端下部とロアアーム前側支持部２１ａとを連結するように延びるとともに、閉断面空間が内部に構成された第２フレーム４５と、フロアトンネル８１の後端上部とロアアーム前側支持部２１ａとを連結するように延びるとともに、閉断面空間が内部に構成された第３フレーム４４とを備えた。【選択図】図１