To provide a printing quality inspection device of a printing press capable of certainly preventing the erroneous operation/erroneous detection of a detector without receiving the adverse effect of heat or light from a dryer.

The printing press is equipped with a feed means for feeding printed paper W to a delivery part 8, UV devices 15 and 16 for front and back surfaces for drying the ultraviolet curable ink printed on the paper W fed by the feed means and the printing quality inspection device for inspecting the printed surface of the paper W fed by the feed means. Inspection cameras 21 and 22 for front and back surfaces are provided at a position not receiving the effect of heat of the UV devices 15 and 16 for the front and back surfaces and/or at a position not receiving the effect of light.