Vehicle body front structure, and method for absorbing impact on vehicle body front structure

In a vehicle body front structure 10, a sub frame 13 is fixed to a front mount bracket 45 and a rear mount bracket 46 of a pair of front side frames 21. A power unit 15 is disposed in front of the subframe 13 within the vehicle body, and the power unit 15 is supported on the pair of front side frames 21. An inclined surface 66 is formed in the sub frame 13, and the inclined surface 66 is inclinedat an upward slope toward the rear of the vehicle body. The rear part 32a of the power unit 15 is made to face the inclined surface 66.