PARKING AID SYSTEM

PROBLEM TO BE SOLVED: To provide a parking aid system capable of notifying positional dislocation in the width direction with respect to a parking frame of a vehicle.SOLUTION: A control device 40 calculates the positional dislocation d in the width direction with respect to the parking frame of the vehicle and an inclination (a first inclination CA1) of the vehicle with respect to the parking frame based on a rear image P image photographed by a rear camera 10, and forms a first inclined image GA1 being an image of indicating its first inclination CA1 and a rotation direction indicating image GD of indicting the rotation direction of steering for reducing its first inclination CA1. The control device 40 displays the rear image P as an image on an image display 30, and superimposes and displays the first inclined image GA1 and the rotation direction indicting image GD on a position corresponding to the size of the positional dislocation d on its image-displayed rear image P.