Abstract: A rocker structure includes a closed cross-sectional part that extends along a vehicle front-rear direction on the outer side of a floor panel of a vehicle in a vehicle width direction, a horizontal plate, and a first vertical plate. The closed cross-sectional part includes an outer wall, an inner wall, a lower wall, and an upper wall. The horizontal plate has a ridge and a valley, and is propped along the vehicle width direction between the outer wall and the inner wall, and the ridge and the valley are provided alternately along the vehicle width direction. The ridge protrudes upward in the vehicle-height direction, and the valley is depressed downward in the vehicle-height direction. The first vertical plate is propped along the vehicle-height direction between the horizontal plate and one of the lower wall and the upper wall.

Abstract: A rocker structure includes a closed cross-sectional part that extends along a vehicle front-rear direction on the outer side of a floor panel of a vehicle in a vehicle width direction, a horizontal plate, and a first vertical plate. The closed cross-sectional part includes an outer wall, an inner wall, a lower wall, and an upper wall. The horizontal plate has a ridge and a valley, and is propped along the vehicle width direction between the outer wall and the inner wall, and the ridge and the valley are provided alternately along the vehicle width direction. The ridge protrudes upward in the vehicle-height direction, and the valley is depressed downward in the vehicle-height direction. The first vertical plate is propped along the vehicle-height direction between the horizontal plate and one of the lower wall and the upper wall.