It includes head that nasal sinus, which enters implantation equipment, is the position of lacrimal apparatus to be arranged in, and extend into nasal sinus when implantation material is implanted into the fluid communication path provided between lacrimal apparatus and paranasal sinus passes through inner passage and passes through implantation material. The implantation material and flanged head portion that head has the transverse circumference of the longitudinal axis are around 360 degree of axis extension. It is arranged in towards the implantation lacrimal apparatus with engagement tissue in flange portion when implantation. Head includes the distal flange portion of recessed bottom cutting portion, and there is recess undercutting to extend 360 degree around the head that the axis extends on periphery. A kind of manufacturing method includes the preliminary form of modification, and one kind includes keeping smooth surface roughening and/or expanding that preliminarily form head include preliminarily forming spill bottom cutting portion. Head.
