A needle module includes a needle fixing unit including a first surface contacting the skin, a second surface opposite the first surface, needle seating holes, and medicine discharge holes, needles disposed in the needle seating holes and having tips, an energy transfer plate including a third surface in contact with ends of the needles opposite the tips, a fourth surface opposite the third surface, and through-holes formed corresponding to the medicine discharge holes, a medicine delivery channel unit including a fifth surface in contact with the fourth surface, a sixth surface opposite the fifth surface, medicine delivery holes formed corresponding to the through-holes, a medicine injection area, and a medicine delivery groove connecting the medicine injection area to the medicine delivery holes, and a Luer lock unit coupled to the needle fixing unit and including a medicine delivery passage to supply medicine to the medicine injection area.

A male Luer coupler supporting partial locking threads facilitates peripheral device coupling to a host device via the coupler.