A vehicle end section structure comprising: a bumper reinforcement that is of elongated shape, that is provided at a vehicle front end portion or at a vehicle rear end portion, and that is disposed with length direction in a vehicle width direction; a center strengthening member having a plate-shaped center front strengthening member that comprises a center collision face bearing an input load, and facing toward the vehicle front side, that is fixed to the bumper reinforcement, and that projects out from the bumper reinforcement in a vehicle up-down direction, the plate shaped center front strengthening member configuring the front side of the center strengthening member; and a plate-shaped center rear strengthening member that is configured as a separate body to the plate-shaped center front strengthening member, that is fixed to the bumper reinforcement, that is joined to the plate-shaped front strengthening member at a position projected out from the bumper reinforcement in the vehicle up-down direction, the plate-shaped center rear strengthening member configuring the rear side of the center strengthening member, the plate-shaped center front strengthening member and the plate-shaped center rear strengthening member being disposed with the vehicle front-rear directions reversed when installed at a vehicle rear end portion, characterized in that the plate-shaped center front strengthening member, the plate-shaped center rear strengthening member and an upper face of the bumper reinforcement configure a closed cross-section enclosing the bumper reinforcement, and in that the plate-shaped center rear strengthening member comprises a joint portion that is disposed at a far side of the plate-shaped center rear strengthening member from the bumper reinforcement in the vehicle up-down direction and that is joined to the plate-shaped center front strengthening member, and an inclined portion that inclines from the joint portion toward the vehicle front-rear direction rear side on progression toward the bumper reinforcement. a bumper reinforcement that is of elongated shape, that is provided at a vehicle front end portion or at a vehicle rear end portion, and that is disposed with length direction in a vehicle width direction; a center strengthening member having a plate-shaped center front strengthening member that comprises a center collision face bearing an input load, and facing toward the vehicle front side, that is fixed to the bumper reinforcement, and that projects out from the bumper reinforcement in a vehicle up-down direction, the plate shaped center front strengthening member configuring the front side of the center strengthening member; and a plate-shaped center rear strengthening member that is configured as a separate body to the plate-shaped center front strengthening member, that is fixed to the bumper reinforcement, that is joined to the plate-shaped front strengthening member at a position projected out from the bumper reinforcement in the vehicle up-down direction, the plate-shaped center rear strengthening member configuring the rear side of the center strengthening member, a plate-shaped center front strengthening member that comprises a center collision face bearing an input load, and facing toward the vehicle front side, that is fixed to the bumper reinforcement, and that projects out from the bumper reinforcement in a vehicle up-down direction, the plate shaped center front strengthening member configuring the front side of the center strengthening member; and a plate-shaped center rear strengthening member that is configured as a separate body to the plate-shaped center front strengthening member, that is fixed to the bumper reinforcement, that is joined to the plate-shaped front strengthening member at a position projected out from the bumper reinforcement in the vehicle up-down direction, the plate-shaped center rear strengthening member configuring the rear side of the center strengthening member, the plate-shaped center front strengthening member and the plate-shaped center rear strengthening member being disposed with the vehicle front-rear directions reversed when installed at a vehicle rear end portion, characterized in that the plate-shaped center front strengthening member, the plate-shaped center rear strengthening member and an upper face of the bumper reinforcement configure a closed cross-section enclosing the bumper reinforcement, and in that the plate-shaped center rear strengthening member comprises a joint portion that is disposed at a far side of the plate-shaped center rear strengthening member from the bumper reinforcement in the vehicle up-down direction and that is joined to the plate-shaped center front strengthening member, and an inclined portion that inclines from the joint portion toward the vehicle front-rear direction rear side on progression toward the bumper reinforcement.