There is provided a printing device which comprises a print data receiving unit, a transparent property judgment unit, a transparency processing unit, a transparency processing buffer which stores the transparency-processed data generated in the transparency processing, an image data generating unit configured to generate image data based on at least one of the transparency-processed data and the objects, an image data storage control unit, a print engine, and an object placement judgment unit which regards the page memory as a set of bands defined as prescribed areas and judges in which bands each of the objects is to be placed by use of the objects. The transparency processing unit judges whether to execute the transparency processing for a band based on whether the band is judged by the object placement judgment unit to have at least a part of a transparent object.