The flexible tube includes a close winding region, a coarse winding region continuously formed on the base end side of the close winding region along the longitudinal axis and formed so as to be easily bent with respect to the close winding portion, A first outer layer which covers and forms a first flexible portion in cooperation with the tightly wound region and a second outer layer which cooperates with the close winding region to make it harder to bend than the first flexible portion A second outer layer that covers the outer side of the coarse winding region and cooperates with the coarse winding region to be less bendable than the first flexible portion and has the same or second A third outer layer that forms a third flexible portion that is harder to bend than the flexible portion of the first outer layer and the second outer layer, and a third outer layer that is continuously arranged between the second and third outer layers and that has a boundary position And a fourth outer layer which covers the outer side of the first outer layer and reduces the difference in bending difficulty / easiness of bending at the boundary position.可撓管は、密着巻き領域と、長手軸に沿って密着巻き領域の基端側に連続して配置され密着巻き部に対して曲げ易く形成された疎巻き領域と、密着巻き領域の外側を被覆し、密着巻き領域と協働して第1の可撓部を形成する第1の外層と、密着巻き領域と協働して、第1の可撓部よりも曲げ難くする第2の可撓部を形成する第2の外層と、疎巻き領域の外側を被覆し、疎巻き領域と協働して第1の可撓部よりも曲げ難く、第2の可撓部と同じ又は第2の可撓部よりも曲げ難い第3の可撓部を形成する第3の外層と、前記第2及び第3の外層の間に連続して配置されて密着巻き領域及び疎巻き領域の境界位置の外側を被覆し、前記境界位置の曲げ難さ/曲げ易さの差を小さくする第4の外層とを有する。
