To provide a vehicular noise prevention device which can prevent a nuisance to the environment even if the volume in a cabin is large, without reducing the volume.

When the volume in the cabin is equal to a specific value or more and at the same time the current location of a vehicle is in a residential area or an urban area, or people are present around the vehicle, the vehicular noise prevention device functions to close an open window. On the other hand, even if the volume in the cabin is equal to the specific value or more, on condition that the current location of the vehicle is not in the residential area or the urban area, or people are not present around the vehicle, the device does not close the window even if it is opened.