Vehicle seat

A vehicle seat, comprising:

• a seat cushion that supports a gluteal region of a vehicle occupant;
• a seatback that is mounted at a seat rear side end portion of the seat cushion, and that supports a back region of the vehicle occupant;
• a fixed supporting portion that is fixed to a floor of a vehicle body at a seat lower side of the seat cushion;
• a movable supporting portion that is fixed to the seat cushion and is movably supported by the fixed supporting portion movably;
• and
• an energy absorbing member that is provided between the fixed supporting portion and the movable supporting portion, thereby restricting displacement of the movable supporting portion with respect to the fixed supporting portion, and, as a result of the seatback being pushed toward the seat rear side at a time of a collision of a vehicle, the energy absorbing member being deformed and the movable supporting portion being displaced with respect to the fixed supporting portion, wherein
• the energy absorbing member comprises an elliptical ring having a varying thickness dimension along a circumference of the elliptical ring, including a greater thickness at each of a front portion and a rear portion of the elliptical ring than at side portions of the elliptical ring, such that lateral movement of a portion of the movable supporting portion disposed inside the elliptical ring is resisted to a greater degree than fore and aft movement.