Left and right front side frames are disposed on left and right side of vehicle front portion, respectively, and extend in a front-and-rear direction of the vehicle body. The left and right front side frames each include a lower branching frame having an inclined part inclined downward from a front part of a motor room toward a vehicle floor, and an upper branching frame branching from the lower branching frame, disposed above the inclined part of the lower branching frame, and including a bent part. The upper branching frame is supported by a plurality of support columns connected to frames disposed around the motor room.