A dash-board lower panel in a vehicle body includes a vertical plate-shaped partition plate that partitions the vehicle body into a front and a rear section, and an inclined plate that inclines downward and rearward from the bottom end of the partition plate. At least part of the rear surface of the partition plate is reinforced by a reinforcement plate. The reinforcement plate has an extended section at the bottom end thereof. The extended section extends from above a bent section, which is between the partition plate and the inclined plate, to below the bent section, and is joined to the inclined plate. A closed cross-section body, which is long and narrow in the vehicle-width direction, is formed by the extended section and the dash-board lower panel.