In accordance with one embodiment, a printer apparatus comprises a first paper conveyance path configured to convey a first paper which has printing surfaces on both sides, that is, a first surface and a second surface serving as a back surface of the first surface; a first printing section configured to carry out printing on the first surface; a second printing section configured at the downstream side of the first printing section in a paper conveyance direction to carry out printing on the second surface; and a second paper conveyance path configured to merge with the first paper conveyance path between the first printing section and the second printing section, and convey a second paper which has a printing surface on either of a first surface and a second surface serving as a back surface of the first surface.