Patent ID: 8911354

Claim:
A resin tube configured to be inserted in a flexible tube of an endoscope or a connection cable, the resin tube comprising: a first resin tube including, on a part of an outer surface thereof, a helical-shaped first groove; a second resin tube including, on a part of an outer surface thereof, a helical-shaped second groove; a first coil wound on the first groove of the first resin tube; a second coil wound on the second groove of the second resin tube; and a connecting pipe configured to connect one end of the first resin tube and one end of the second resin tube, wherein the first resin tube is externally fitted and connected to the connecting pipe at a coil-removed part where the first groove is formed and the first coil is peeled, removed and not wound, and the second resin tube is externally fitted and connected to the connecting pipe at a part where the second coil is not wound.