To provide a process printing apparatus capable of performing a multi-color printing using a single plate cylinder.

A process printing apparatus comprises a plate cylinder 1 rotatably provided and adapted to be supplied thereinto with a first ink 24, a first form plate feeding unit 44 for processing a first master 2 containing a thermoplastic resin film to feed the same to the plate cylinder 1, a second form plate feeding unit 45 for feeding to the plate cylinder 1 a second master 3, in which a porous support body and a thermoplastic resin film are applied in this order on an ink impermeable film and the porous support body is soaked with a second ink, and a process unit 46b for processing the second master 3 wound around the plate cylinder 1, and either of the form plate feeding units is actuated. Accordingly, the first form plate feeding unit 44 feeds the first master 2 to permit the first ink 24 to be transferred to a printing paper 5. Alternatively, the second form plate feeding unit 45 feeds the second master 3 to permit the second ink to be transferred to the printing paper 5.