A vehicle body rear part structure for a vehicle, comprising: a rear side frame which extends in a vehicle body front-rear direction on a vehicle body rear part; a rear subframe which is disposed below the rear side frame, and extends in the vehicle body front-rear direction; a torsion beam suspension device including a pair of left and right trailing arms, which is disposed on a vehicle body rear part, and includes a torsion beam extending in a vehicle width direction; and an important safety related component which is disposed on a vehicle body rear side of the torsion beam , and is mounted on the rear subframe , wherein the rear subframe includes a front load absorbing portion and a rear load absorbing portion which extend rearwardly of a vehicle body from the important safety related component disposed on the vehicle body rear part, are disposed on a vehicle body rear side with respect to the important safety related component , and are configured to absorb a collision load when the collision load from rearwardly of the vehicle body is applied, the important safety related component includes at least one of a power generator and an electrical storage device, the rear load absorbing portion is disposed on the vehicle body rear side of the front load absorbing portion , strength of the rear load absorbing portion against compression in an axis direction is set low, as compared with strength of the front load absorbing portion , and characterized in that the rear subframe further includes a frame connecting portion which is disposed between the front load absorbing portion and the rear load absorbing portion , is connected to the front load absorbing portion and the rear load absorbing portion , and is connected to the rear side frame . a rear side frame which extends in a vehicle body front-rear direction on a vehicle body rear part; a rear subframe which is disposed below the rear side frame, and extends in the vehicle body front-rear direction; a torsion beam suspension device including a pair of left and right trailing arms, which is disposed on a vehicle body rear part, and includes a torsion beam extending in a vehicle width direction; and an important safety related component which is disposed on a vehicle body rear side of the torsion beam , and is mounted on the rear subframe , wherein the rear subframe includes a front load absorbing portion and a rear load absorbing portion which extend rearwardly of a vehicle body from the important safety related component disposed on the vehicle body rear part, are disposed on a vehicle body rear side with respect to the important safety related component , and are configured to absorb a collision load when the collision load from rearwardly of the vehicle body is applied, the important safety related component includes at least one of a power generator and an electrical storage device, the rear load absorbing portion is disposed on the vehicle body rear side of the front load absorbing portion , strength of the rear load absorbing portion against compression in an axis direction is set low, as compared with strength of the front load absorbing portion , and characterized in that the rear subframe further includes a frame connecting portion which is disposed between the front load absorbing portion and the rear load absorbing portion , is connected to the front load absorbing portion and the rear load absorbing portion , and is connected to the rear side frame . <EOS>