FALLING OBJECT DETERMINATION DEVICE, DRIVING SUPPORT SYSTEM, AND FALLING OBJECT DETERMINATION METHOD

A falling object determination device configured to be mounted on a vehicle is provided. The falling object determination device includes an acquisition unit configured to acquire, as a first detection signal, information indicating displacement of an object near a cargo bed of a nearby vehicle which travels near the own vehicle; and a control unit configured to calculate at least one of a vibration frequency, an amplitude and a size of the object near the cargo bed by using the first detection signal, and performs a determination whether the object near the cargo bed is an object which is likely to fall from the cargo bed or an object which is falling from the cargo bed in accordance with a calculation result.