According to an embodiment, a printer apparatus sets a feeding amount when ejecting label paper from a paper ejection port of an attachment in accordance with a distance from a paper ejection port to the paper ejection port of the attachment. Further, the printer apparatus sets a back-feeding amount when reversely feeding the label paper after printing ejected from the paper ejection port of the attachment to a next printing position in accordance with presence or absence of a head-up function of the printer apparatus.