1. A printing apparatus comprising: a transport portion that transports a medium in a transport direction; an upstream side background color nozzle row in which nozzles for ejecting a background color ink to the medium are aligned along the transport direction; an upstream side color nozzle row in which nozzles for ejecting a color ink to the medium are aligned along the transport direction; a downstream side background color nozzle row that is disposed in the downstream side further than the upstream side background color nozzle row concerning the transport direction; a downstream side color nozzle row in which nozzles for ejecting the color ink to the medium are aligned along the transport direction; a moving section that moves the upstream side background color nozzle row, the upstream side color nozzle row, the downstream side background color nozzle row, and the downstream side color nozzle row in a intersection direction intersecting the transport direction; and a control section that performs a background image pre-printing which enables each ink to be ejected from the upstream side background color nozzle row and the downstream side color nozzle row and can land the color ink after landing the background color ink on the medium in a region concerning the transport direction, and a background image post-printing which enables each ink to be ejected from the upstream side color nozzle row and the downstream side background color nozzle row and can land the background color ink after landing the color ink on the medium in a region concerning the transport direction, the control section performing the printing so as to switch over the background image pre-printing and the background image post-printing on the one medium.