An occupant protection device includes: a collision prediction part; a seatback actuator that adjusts a reclining angle; a seatbelt retracting part; a reclining angle sensor; and a controller that sets the reclining angle to a target angle and that controls the seatbelt retracting part so that the seatbelt is retracted when the collision prediction part determines that a collision will occur. Accordingly, the controller executes a control so that the driving force of seatbelt retracting part when the reclining angle is decreased is smaller than at least one of the driving force of seatbelt retracting part when the reclining angle is not changed or when the driving force of seatbelt retracting part when the reclining angle is increased.