The invention relates to a monocanaliculonasal and/or monocanalicular intubation assembly particularly intended for lacrimonasal imperforation including a probe (1) made of a first material, in particular a flexible material such as silicone, the probe having a substantially cylindrical shape along a longitudinal axis; and a device for inserting the probe into a lacrimal canal or canaliculus. The device includes an insertion tube (10) made of a rigid material, such as a metal, having a distal end opening and a proximal end opening, the tube having a shape and a size enabling it to receive the probe therein; and a mandrel (20) for pushing the probe and expelling the same from the insertion tube by the distal end opening.