A corrugated tube mounting structure includes: a corrugated tube into which an electric wire is inserted, formed with a slit into which the electric wire can be inserted, the slit being formed along a length direction of the corrugated tube; and a protector includes a main body inside which the electric wire is arranged and an outlet portion from which the electric wire is drawn out. The outlet portion is provided with a cover configured to close an opening into which the corrugated tube can be inserted. The cover is provided with a pressing portion configured to press the electric wire, which is exposed from an end of the corrugated tube on a main body side, toward the inside of the corrugated tube.