To realize a wire dot printing head which can be assembled in a short time without skill.

This printing head comprises a base guide 1c having a guide hole of a tire hammer of the first and second wire hammer units group, and a top guide 2 having a guide hole of a wire hammer of the second wire hammer units group, and the base guide 1c and the top guide 2 are stacked'. On this occasion, at least one guide member 1b, 3b, 5b having a guide hole of a wire hammer 4 of the second wire hammer units group, is formed between the base guide 1c and the top guide 2, the guide holes of the guide members 1b, 3b, 5b have a shape of taper, and a diameter of an outlet of the taper part and a diameter of the wire hammer 4 are controlled within the extents for preventing the wire hammer 4 having passed through the taper part, from being over a diameter of an inlet of the taper part formed on the guide member of the next stage.