To provide a printing apparatus which can automatically form a water application roller trace (like-attaching roller trace) for confirming the nip pressure of the water application roller (ink application roller).

The printing apparatus has a controller 18 having a storage means 102 storing at least one water application roller trace forming position (ink application roller trace forming position) set in advance and a confirmation position. The controller 18 drives a solenoid valve 201 for operating a solenoid 41 for vertically moving a motor 200 and the water application roller and an air cylinder 91 for vertically moving the ink application roller and forms the water application roller trace (ink application roller trace) on the surface of a printing plate at the water application roller trace forming position (ink application roller trace forming position). The controller 18, after forming the water application roller trace (ink application roller trace), rotates a plate cylinder to a confirmation position which can be confirmed by an operator for positioning.