Occupant protection device

An occupant protection device comprising:

• an airbag that is configured to cover a head of an occupant, and that is configured as an integral bag body including (i) a front deployment section that is housed in a headrest of a vehicle seat, that is inflated and deployed on receipt of a supply of gas, and that is deployed at a seat forward direction with respect to the head of the occupant, and (ii) a pair of left and right lateral deployment sections that are connected to the front deployment section and that are inflated and deployed at seat sides with respect to the head of the occupant;
• a lifting mechanism that raises and lowers the vehicle seat;
• and
• a controller that uses the lifting mechanism to lower the vehicle seat to an airbag deployable height in cases in which a vehicle collision has been determined to be unavoidable based on a signal from a collision prediction sensor and a height of the vehicle seat is higher than the airbag deployable height, and that inflates and deploys the airbag after lowering the vehicle seat.