STAGGERING DETERMINATION DEVICE, STAGGERING DETERMINATION METHOD, AND STORAGE MEDIUM

The staggering determination device includes a staggering determination unit that determines whether or not there is a fluctuation in traveling of the own vehicle, and in a case where there is a target in the vicinity of the own vehicle traveling and a face or a line of sight of the driver of the own vehicle is directed to the target, the threshold value changing unit changes the fluctuation determination threshold used by the threshold value changing unit for determining whether or not there is a fluctuation in traveling of the own vehicle according to the positional relationship between the own vehicle and the target, or the staggering determination unit stops the determination of whether or not there is a fluctuation in traveling of the own vehicle.