A catheter of the present invention includes a long tubular body, an operating line and an operating portion. The tubular body includes a long inner layer which draws a main lumen, a wire-reinforced layer which is formed by winding a reinforced wire around the inner layer, a plastic subtube which is assigned to extend along the longitudinal direction of the main lumen on the outside of the wire-reinforced layer and draws a sublumen which has a smaller diameter compared to the mainlumen, a plastic outer layer which includes the wire-reinforced layer and the subtube, and retaining wire. The operating line is housed inside the sublumen in a movable state and connected to the distal portion of the tubular body in its leading end. The retaining wire is included in the outer layer and binds the subtube and the wire-reinforced layer together. The retaining wire is impacted into the periphery of the outer diameter side of the subtube.本發明之導管具備長條之管狀本體、操作線、及操作部。管狀本體包含:長條之內層,其劃定主管腔;線加強層,其係於該內層之周圍捲繞加強線而成;樹脂製之副管,其以沿主管腔之長度方向延伸之方式配置於該線加強層之外側,且劃定直徑小於主管腔之副管腔;樹脂製之外層,其內包線加強層及副管;及保持線。操作線係可移動地插通於副管腔之內部且前端連接於管狀本體之遠位部。保持線係內包於外層,且將副管與線加強層一同捲繞。保持線嵌入至副管之外徑側之周面。10‧‧‧管狀本體20‧‧‧主管腔24‧‧‧內層30‧‧‧線加強層32‧‧‧加強線40‧‧‧副管42‧‧‧副管腔50‧‧‧外層52‧‧‧第一外層54‧‧‧第二外層60‧‧‧操作線70‧‧‧保持線80‧‧‧第二加強層82‧‧‧第二加強線100‧‧‧導管W‧‧‧圓周方向之網眼尺寸
