An elongate vehicle reinforcement member having a U-shaped cross section, wherein the member is disposed inside and welded to a vehicle structural member, wherein the vehicle structural member includes opposite base lateral walls, the vehicle reinforcement member including: opposite reinforcement lateral walls extending in vehicle height and width directions, each having an outward edge on an outer side in vehicle width direction and an inward edge on an inner side; and a reinforcement connecting wall connecting the outward edges of the lateral walls, each lateral wall together with the connecting wall forming a ridge, each lateral wall including a row of welding projections, each protruding outward over the entire width of the lateral wall, each welding projection having a raised welding surface wherein the reinforcement lateral wall is welded to the base lateral wall, the welding projections in each row being arranged at intervals along vehicle height direction.