To provide a safe rear confirmation support device with favorable operability and hardly any dead angle in a rear visual field, and an on-vehicle navigation device using this.

In a trunk rear part center, a roof rear part center, roof rear part both ends or the like of one's vehicle, two cameras with view points respectively directed to right and left oblique rears are installed or one camera capable of horizontally swinging is installed, and by this or these cameras, an image shooting a traffic situation in the oblique rear of one's vehicle is displayed on a monitor inside a vehicle cabin along with a map image. By this, a dead angle in the vehicular rear can be reduced by just one or two cameras. Since view point movement of a driver can be reduced, the driver can confirm right and left oblique rears of one's vehicle while keeping the front in one's visual field, and since this device can be shared from backing support such as in parking or backing into a garage to rear confirmation in lane changing, safety is improved throughout all driving operations.