To provide a printing device that can contribute to miniaturization of the device and cost reduction.

The printing device includes a plurality of treatment devices performing a treatment on a base material, a transporting part 13 transporting the base material among the treatment devices, a detection part 120 provided to the transporting part and performing a detecting action in placement parts in the treatment devices, a storage part 130 associating and storing a position and detection data detected by the detection part, a determination part determining presence of the base material in the treatment devices based on the data stored in the storage part, and a control part CONT determining a treatment action based on determination result of the determination part.