To provide a disposable printing head cartridge having integrally formed ink-jet printing head and wiper debris collectors.

This transaction printing apparatus has a base 14 of not larger than a fixed breadth, and a printing head cartridge stool 30 which is loaded to linearly move along a move route following the breadth and is sized to support from below the printing head cartridges 26 and accelerate jetting ink to transaction sheets of a fixed breadth. The printing head cartridge includes a nearly box-shaped cartridge body 34, the printing head 47 liquid communicating with an ink feed for jetting ink stored in the cartridge body, and a boss 36 integrally coupled with a front wall member of the cartridge body and projecting outward for spacing an interval of the printing head from the front wall member and defining a pair of the wiper debris collectors.