Patent ID: 7717487

Claim:
A seat holding portion structure comprising: a side member joined to a bottom surface side of a vehicle body floor and extending substantially in a vehicle longitudinal direction and, together with the vehicle body floor, forming a closed cross-sectional portion that extends substantially in the vehicle longitudinal direction, the side member having a kick portion that joins a front portion and a rear portion of the side member that are offset in a vehicle vertical direction, and front and rear end sides of the kick portion are bent; a floor reinforcement formed in a shape of a box whose vehicle upper side is open, the floor reinforcement being installed within the side member from an opening portion of the vehicle body floor that is formed in a vicinity of the kick portion; a seat holding member that is elongated and extends in the vehicle longitudinal direction at a vehicle upper side of the vehicle body floor, and supports a vehicle seat, a rear end portion of the seat holding member being inserted in the floor reinforcement; and a connecting body fixed to the rear end portion of the seat holding member and disposed within the floor reinforcement, and disposed in a range that extends over a front and rear of at least one of the front end side bent portion and the rear end side bent portion of the kick portion, and, together with the floor reinforcement, mounted to a bottom portion and an upper end portion of the side member, and formed as a closed cross-sectional structure as seen in a vehicle front view.