An apparatus with a printer for a printing paper strip includes a paper feed guide having an outlet on one side of a platen, a paper discharge guide having an inlet on the other side of the platen, a unit frame attached to an apparatus housing to be able to rock between an open position where the paper discharge guide is exposed and a closed position where the paper discharge guide is covered and the printing paper strip is allowed to be guided, a drive roller provided to the apparatus housing located on the other side of the platen, a pinch roller mechanism provided to the unit frame and having a pinch roller which goes away from the drive roller when the unit frame is located in the open position, and approaches the driver roller when the unit frame is located in the closed position, and a rotation drive mechanism for rotating the drive roller to carry the printing paper strip from the paper feed guide to the paper discharge guide via the platen.