An around-view monitoring (AVM) apparatus including a camera module for obtaining a plurality of video images from around a vehicle; a display unit for displaying an around-view video image; and a control unit for composing the plurality of video images to generate an around-view video image, detecting a first parking line and a second parking line from the around-view video image, tracking the detected first and second parking lines, and generating an imaginary parking line when any one of the first and second parking lines is not tracked to control the display unit to output the around-view video image.