PARKING ASSISTANCE DEVICE

A parking support device is provided which, when calculating a parking route followed by a host vehicle, calculates the parking route based on the reliability of obstacle information acquired by a sensor mounted on the host vehicle, thereby improving the convenience of a driver of the host vehicle. A parking support device includes an obstacle information analysis unit that recognizes an external world from external world information detected by a camera and a sonar that acquire the external world information, and a parking route calculation unit that calculates a parking route of a host vehicle based on information on an obstacle in the external world recognized by the obstacle information analysis unit , and the parking route calculation unit sets a distance between the obstacle and the host vehicle in the parking route according to a degree of reliability of information on the obstacle.