PROBLEM TO BE SOLVED: To provide a catheter tube manufacturing method capable of efficiently manufacturing catheter tubes whose diameters are varied according to portions.SOLUTION: A catheter tube manufacturing method for a catheter tube 10 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 unit core wire 47 which has a large diameter part 41 and a small diameter part 42 of different external diameters already been formed a joining step, following the internal coat layer body forming step, of joining a plurality of unit core wires arranged in a radial line direction an intermediate step, following the joining step, of disposing another member on or applying predetermined processing to a structure obtained on a core wire 40 formed by joining of the unit core wires 47 a cutting step, following the intermediate step, of cutting, together with the core wire 40, the structure obtained on the core wire 40, at a predetermined position of the large diameter part 41 and small diameter part 42 of the core wire 40, into a plurality of discrete tubes 61 and a core wire removing step of removing the core wire 40 from the discrete tubes 61.COPYRIGHT: (C)2014,JPO&INPIT【課題】部位によって径が異なるカテーテル用チューブを効率よく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】外径の異なる太径部41および細径部42が予め形成された単位芯線47上に、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、内層被覆体形成工程よりも後に、複数の単位芯線47を軸線方向へ並べて接合する接合工程と、接合工程よりも後に、単位芯線47が接合されてなる芯線40上に得られる構造体に他の部材を配置し、または所定の処理を施す中間工程と、中間工程の後に、芯線40上に得られる構造体を、芯線40の太径部41および細径部42の所定の位置で芯線40とともに切断して複数の単体チューブ61を切り出す切断工程と、単体チューブ61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10の製造方法である。【選択図】図4
