A parking support device capable of reliably supporting a parking driving operation by a driver, comprising an image acquisition portion for acquiring an image peripheral to a vehicle captured by a vehicle-mounted image pickup device; an image display portion for displaying the peripheral image; and an indicator output portion for superimposedly displaying an indicator, comprising a pair of left and right vehicle width extension lines extending rearwards of the vehicle, on the peripheral image in order to guide a driver during a parking operation by the driver. The parking support device supports parallel parking, comprising a first turning step, in which the vehicle is reversed while being turned and driven into a parking area, and a second turning step, in which the vehicle is aligned in a parallel direction while being turned in a direction opposite to that in the first turning step. The indicator output portion superimposedly displays, during the second turning step, only the vehicle width extension line that is on an outside of the turn.