An occupant protection device for a vehicle includes a collision predictor, a main airbag, and a deployment controller. The collision predictor is configured to predict a collision of the vehicle. The main airbag is configured to deploy toward an occupant from a front of the vehicle when a collision of the vehicle is predicted by the collision predictor. The main airbag includes a first deployment part, an arm-push-away deployment part, and a second deployment part. The controller is configured to cause the main airbag to deploy toward the occupant when a collision of the vehicle is predicted by the collision predictor. The controller is configured to, when a collision of the vehicle is predicted by the collision predictor, cause the first deployment part to deploy, subsequently cause the arm-push-away deployment part to deploy to push an arm of the occupant away, and thereafter, cause the second deployment part to deploy.