OCCUPANT PROTECTION DEVICE

An occupant protection device includes a seat having a seat portion and a backrest portion, an elongated restraining member for restraining an occupant in the seat, and a take-up unit that takes up the restraining member, wherein the restraining member is fed out from a housing portion of the seat and pulled up toward an upper end side of the backrest portion in accompaniment to an operation of the take-up unit, forming an occupant supporting portion, which supports a back face side of left and right thigh portions of the occupant, and a pulling portion that extends from both left and right ends of the occupant supporting portion to the upper end side of the backrest portion, and restrains the occupant against the backrest portion.