Seat structure for vehicle

A seat structure for a vehicle, which comprises a headrest placed behind a passenger's head, and a load transfer portion which has a pressure receiving portion that is located at substantially the same level as a passenger's waist, and receives a load from the passenger's waist in a rear impact collision, and displaces said headrest along a predetermined path by the load acting on said pressure receiving portion, comprising:

• a seatback frame having an upper surface frame which is arranged on an upper end face of a seatback, and extends in a widthwise direction of a vehicle body, and side surface frames which are arranged on side end faces of the seatback, and extend in an up-and-down direction,
• wherein said load transfer portion is axially supported by said side surface frames at a position below said upper surface frame, and crosses said upper surface frame of the seatback when viewed from a back-and-forth direction of the vehicle body to permit forward displacement of said headrest, and contacts said upper surface frame in an ordinary state, and is allowed to be displaced only toward a front side of the vehicle body so as to prevent said headrest from moving toward the rear side of the vehicle body even when said headrest is pushed toward the rear side of the vehicle body, or when a portion of said load transfer portion below axial support points by said side surface frames is pushed toward the front side of the vehicle body, and is formed by an upper portion, a lower portion, headrest support guides extending upward from the upper portion, and right and left side portions of which both ends area connected to each end of the upper portion and the lower portion and which are movably supported by the side surface frames.