PROBLEM TO BE SOLVED: To provide a catheter tube manufacturing method capable of highly accurately manufacturing a catheter tube whose radial thickness is varied according to a portion.SOLUTION: A catheter tube manufacturing method comprises: an internal coat layer body forming step of forming an internal coat layer body 51 by applying a coat of a resign, by a dip molding method with the lifting speed changed where the external diameter of a core wire 40 changes, onto the core wire 40 which has a large diameter part 41 and a small diameter part 42 that each have different external diameters and a core wire removing step of removing the core wire 40 from a structure obtained by forming the internal coat layer body 51 on the core wire 40.COPYRIGHT: (C)2014,JPO&INPIT【課題】部位に応じて肉厚の異なるカテーテル用チューブを高い寸法精度で作製可能なカテーテル用チューブの製造方法を提供する。【解決手段】外径の異なる太径部41および細径部42を備える芯線40上に、当該芯線40の外径が変化する部位において引き上げ速度を変化させつつディップ成形によって樹脂を被覆して内層被覆体51を形成する内層被覆体形成工程と、前記芯線40上に内層被覆体51を備えて得られる構造体から芯線40を除去する芯線除去工程と、を有するカテーテル用チューブの製造方法である。【選択図】図3
