A vehicle body front part structure including left and right front side frames located in a front part of a vehicle body and extending in a longitudinal direction of the vehicle body, a front bulkhead mounted between front ends of the left and right front side frames, and a bumper arranged in front of the front bulkhead, wherein: the front bulkhead includes left and right bulkhead side members extending vertically to constitute left and right side parts of the front bulkhead; the left and right bulkhead side members have, at least, left and right front walls facing toward the front of the vehicle body, and left and right rear walls located rearwardly of the left and right front walls, respectively, at a distance therefrom; the bumper overlaps front surfaces of the left and right front walls, wherein inner ends in a vehicle width direction of the left and right front walls and inner ends in the vehicle width direction of the left and right rear walls are formed integrally with left and right inner walls, respectively, so that the left and right bulkhead side members have substantially U-shaped cross sections in a plan view opened outward in the vehicle width direction, characterized in that: the left and right bulkhead side members are provided with left and right stays extending between the left and right front walls and the left and right rear walls, respectively; front ends of the left and right stays, the left and right front walls, and the bumper are joined together; rear ends of the left and right stays are joined to the left and right rear walls, respectively; and the left and right stays are joined not only to the left and right front walls and the left and right rear walls, but also to the left and right inner walls. the front bulkhead includes left and right bulkhead side members extending vertically to constitute left and right side parts of the front bulkhead; the left and right bulkhead side members have, at least, left and right front walls facing toward the front of the vehicle body, and left and right rear walls located rearwardly of the left and right front walls, respectively, at a distance therefrom; the bumper overlaps front surfaces of the left and right front walls, wherein inner ends in a vehicle width direction of the left and right front walls and inner ends in the vehicle width direction of the left and right rear walls are formed integrally with left and right inner walls, respectively, so that the left and right bulkhead side members have substantially U-shaped cross sections in a plan view opened outward in the vehicle width direction, characterized in that: the left and right bulkhead side members are provided with left and right stays extending between the left and right front walls and the left and right rear walls, respectively; front ends of the left and right stays, the left and right front walls, and the bumper are joined together; rear ends of the left and right stays are joined to the left and right rear walls, respectively; and the left and right stays are joined not only to the left and right front walls and the left and right rear walls, but also to the left and right inner walls. the left and right bulkhead side members are provided with left and right stays extending between the left and right front walls and the left and right rear walls, respectively; front ends of the left and right stays, the left and right front walls, and the bumper are joined together; rear ends of the left and right stays are joined to the left and right rear walls, respectively; and the left and right stays are joined not only to the left and right front walls and the left and right rear walls, but also to the left and right inner walls.