A portable printer device (30) is capable of holding a plurality of paper rolls (210). The portable printer device comprises a single printing portion (31) which is provided for printing of each of the plurality of paper rolls. A paper roll hold device (32) includes a plurality of paper roll hold portions (32-1, 32-2) each of which holds one of the plurality of paper rolls, and includes a plurality of paper passages (81, 82) each of which is provided to deliver a paper from one of the plurality of paper roll hold portions (32-1, 32-2) to the printing portion (31).