PROBLEM TO BE SOLVED: To provide a method for manufacturing a resin-made suction tube, which can provide a resin-made suction tube for medical use at a lower cost than ever before. A method of manufacturing a resin-made medical suction tube 100 having a mounting portion 102 and a tapered portion 104, wherein the mounting portion and the tapered portion are linearly connected and molded, and a tip 104a of the tapered portion is slid. Using a mold for finishing the surface, a resin material that can be sterilized by radiation is injected to form a linear suction tube, and the suction tube that has been injection-molded is heated at the connecting portion 106 between the mounting portion and the tapered portion. Equipped with bending. [Selection diagram] Figure 2【課題】従来に比べてより安価にて医療用樹脂製吸引管を提供可能となる、樹脂製吸引管の製造方法を提供する。【解決手段】装着部102及び先細り部104を有する樹脂製の医療用吸引管100の製造方法であって、装着部及び先細り部を直線状に連結して成形しかつ先細り部の先端104aを滑面に仕上げる金型を用いて、放射線滅菌可能な樹脂材を射出して直線状の吸引管を成形し、射出成形された吸引管を加熱して装着部と先細り部との連結部分106にて屈曲させることを備えた。【選択図】図2