Patent ID: 7784858

Claim:
A rear vehicle body structure comprising: left and right rear side frames ( 11 , 12 ) provided in a rear vehicle body section; front and rear cross members ( 14 , 15 ) spanning between the left and right rear side frames ( 11 , 12 ) with a predetermined interval between the cross members; and a sub-frame ( 16 ) disposed beneath the front and rear cross members and having rear suspensions ( 18 , 19 ) provided thereon, said sub-frame including: left and right sub side members ( 51 , 52 ) each having a substantially U shape such that said left and right sub side members project inwardly toward a centerline of the vehicle body; a front sub cross member ( 53 ) spanning between respective near-front-end regions of said left and right sub side members; and a rear sub cross member ( 54 ) spanning between respective near-rear-end regions of said left and right sub side members, wherein the left and right sub side members ( 51 , 52 ) and the front and rear sub cross members ( 53 , 54 ) together constitute a framework ( 46 ) of a substantially rectangular shape, said left sub side member ( 51 ) of the substantially U shape includes a left rear extension portion ( 58 ) extending from the framework toward a rear of the vehicle body, the left rear extension portion being connected to a joint section ( 42 ) where the rear cross member ( 15 ) and the left rear side frame ( 11 ) are joined together, and said right sub side member ( 52 ) of the substantially U shape includes a right rear extension ( 63 ) portion extending from the framework toward the rear of the vehicle body, the right rear extension portion being connected to a joint section ( 44 ) where the rear cross member ( 15 ) and the right rear side frame ( 12 ) are joined together.