The invention is directed to a device (1) and a method for adjusting printheads (2) relative to one another, the printheads each being provided with a nozzle plate having multiple nozzles for printing, and having at least one round hole and/or at least one elongated hole in this nozzle plate for manufacturing and/or assembly purposes, including and using an assembly template for multiple printheads (2), wherein, for each printhead (2), at least one counterpart is provided, preferably in the form of a pin, that fits exactly into at least one round hole and/or at least one elongated hole in the corresponding nozzle plate, so that when the printheads (2) are inserted into the assembly template in such a way that the pairs of round hole counterparts and elongated hole counterparts engage with the corresponding round holes and elongated holes in the nozzle plate, the nozzles of all printheads (2) are aligned with one another in the desired manner.
