Occupant protection device

An occupant protection device, comprising:

• a seat having a seat portion and a backrest portion;
• an elongated restraining member for restraining an occupant in the seat, one end portion in a longitudinal direction of the restraining member being disposed on a left top end side of the backrest portion, another end portion of the restraining member being disposed on a right top end side of the backrest portion, the restraining member being caused to pass from the one end portion to the other end portion through a left side face of the backrest portion, a left side face of the seat portion, a front face of the seat portion, a right side face of the seat portion, and a right side face of the backrest portion, the restraining member being housed in the seat;
• and
• a take-up unit that takes up at least one of the one end portion and the other end portion of the restraining member;
• a motor that operates to drive the take-up unit to take up the at least one of the one end portion and the other end portion;
• and
• a control device that controls the motor to operate, 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.