A nozzle unit for use in an adjoining apparatus which places a heat fused electrically conductive member in an adjoining position for adjoining a first member and a second member, thereby electrically adjoining the first member and the second member, the nozzle unit including: a tubular nozzle assembly having a containing space which contains the conductive member and an aperture which communicates with the containing space, through which the conductive member, contained in the containing space, is ejected to the adjoining position, and which has a diameter larger than a diameter of the conductive member; and a hold member for releasably holding the conductive member in the containing space; wherein the nozzle assembly includes a tubular guide area of an internal diameter same as the diameter of the aperture, in a region from the position of the conductive member, supported by the support member, to the aperture.