Provided is a driving support device including an other-vehicle detection unit that detects if an other-vehicle is traveling in the same lane as a host vehicle. The device also includes an overtaking operation detection unit to detect when the host vehicle overtakes the other-vehicle and a determination unit that evaluates an overtaking operation. When is determined that the overtaking operation is not appropriate, the overtaking operation is deemed a dangerous operation. The driving support device may also include continuation prediction unit that determines whether the other-vehicle will continue traveling in the same lane. If it is determined that the other-vehicle will continue traveling in the same lane, the other-vehicle is identified as a target vehicle by a target vehicle identification unit.