A printing apparatus includes a conveyor, a print engine, and a processing device. The conveyor is configured to convey a print medium in a conveyance direction. The print engine includes a print head, and a platen configured to support the print medium conveyed by the conveyor. The print engine is configured to perform image printing on the print medium supported by the platen while moving the print head in a first direction intersecting the conveyance direction. The processing device has a processing unit removably attached thereto. The processing device is configured to perform a processing process to divide the print medium conveyed by the conveyor into a plurality of media. The processing unit has an identification section for identifying a type of the processing process executable by the processing unit.