A traffic control device includes: a passage schedule calculation unit which calculates, on the basis of vehicle information about vehicles that enter an intersection, passage schedules according to which the vehicles pass through the intersection; a collision determination unit which determines, on the basis of the passage schedules, whether the vehicles have a possibility of a collision; a passage rank setting unit which sets passage ranks for the vehicles if there is the possibility of the collision; and a passage schedule adjustment unit which calculates an adjustment period on the basis of a result of comparing the passage schedules for the vehicles determined to have the possibility of the collision, and delays, by the adjustment period, a passage schedule for a vehicle that has a low passage rank among the vehicles determined to have the possibility of the collision, to adjust the passage schedule.