PROBLEM TO BE SOLVED: To provide a catheter tube manufacturing method capable of manufacturing catheter tubes with a high dimensional accuracy.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 resin onto a core wire 40 by repeating a dip molding process with an axial line direction of the core wire 40 as a lifting direction a plurality of times, of which at least one time the dip molding process is performed in a reverse direction 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】寸法精度の高いカテーテル用チューブを製造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】芯線40上に、当該芯線40の軸線方向を引き上げ方向として少なくとも1回を逆方向で複数回ディップ成形を繰り返すことで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、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
