A predictor 62 predicts a future of a prediction target in a monitoring area. The predictor 62 includes a movement state information acquirer 620 configured to acquire movement state information, a surrounding state information acquirer 621 configured to acquire surrounding state information regarding movement states of traffic participants around the prediction target, a confirmation state information acquirer 623 configured to acquire confirmation state information regarding a surrounding confirmation state of a driver of the prediction target, a moving speed predictor 624 configured to predict a future moving speed of the prediction target on a basis of the movement state information, the surrounding state information, and the confirmation state information, and a collision predictor 625 configured to predict whether or not a collision will occur in a future of the prediction target on the basis of the movement state information, the surrounding state information, and the future moving speed.