A vehicle body front portion structure is provided with a suspension member, a vertical wall and a protruding member. A side portion of the suspension member is disposed at a vehicle body lower side of a front side member. The vertical wall is formed at the suspension member and includes a coupling portion to which a vehicle width direction inner side end portion of a lower arm is coupled, which lower arm supports a front wheel. The protruding member is fastened to a fastening portion provided in the vertical wall, at a vehicle width direction outer side relative to the coupling portion, so as to protrude to the vehicle width direction outer side relative to the front side member in plan view.