A printer includes discharge control devices, a first ID storage device, a control data output device, a connection device, a connection control device, an assigning device, a processor, and a memory. The processor performs outputting print data, which is data to discharge the liquid by the discharge port group connected to the discharge control device, corresponding to the unique ID from the control data output device, by using a communication ID that corresponds to the unique ID, via a connection device controlled by a connection control device, to each of a plurality of discharge control devices, and controlling discharge of the liquid by the discharge port groups to which the plurality of discharge control devices are respectively connected, in accordance with the print data which corresponds to the unique ID of the individual discharge control device and which has been output from the control data output device.